id stringlengths 24 24 | question stringlengths 1 270 | answer stringlengths 1 239 | documents listlengths 1 1 |
|---|---|---|---|
57095defed30961900e84005 | Because of copper's biostatic properties where is a common use for copper? | ships | [
"Copper\n\nCopper is biostatic, meaning bacteria will not grow on it. For this reason it has long been used to line parts of ships to protect against barnacles and mussels. It was originally used pure, but has since been superseded by Muntz metal. Similarly, as discussed in copper alloys in aquaculture, copper allo... |
57095defed30961900e84006 | What has pure copper been replaced with in the building of ships? | Muntz metal | [
"Copper\n\nCopper is biostatic, meaning bacteria will not grow on it. For this reason it has long been used to line parts of ships to protect against barnacles and mussels. It was originally used pure, but has since been superseded by Muntz metal. Similarly, as discussed in copper alloys in aquaculture, copper allo... |
57095defed30961900e84007 | In the aquaculture industry what is copper alloys commonly used to make? | netting materials | [
"Copper\n\nCopper is biostatic, meaning bacteria will not grow on it. For this reason it has long been used to line parts of ships to protect against barnacles and mussels. It was originally used pure, but has since been superseded by Muntz metal. Similarly, as discussed in copper alloys in aquaculture, copper allo... |
57095defed30961900e84008 | Name a property that makes copper a good material to use in marine environments? | corrosion-resistant | [
"Copper\n\nCopper is biostatic, meaning bacteria will not grow on it. For this reason it has long been used to line parts of ships to protect against barnacles and mussels. It was originally used pure, but has since been superseded by Muntz metal. Similarly, as discussed in copper alloys in aquaculture, copper allo... |
5709614c200fba1400367f0b | What group of the periodic table is copper in? | group 11 | [
"Copper\n\nCopper, silver and gold are in group 11 of the periodic table, and they share certain attributes: they have one s-orbital electron on top of a filled d-electron shell and are characterized by high ductility and electrical conductivity. The filled d-shells in these elements do not contribute much to the i... |
5709614c200fba1400367f0c | Name a property that copper, silver and gold have in common. | one s-orbital electron | [
"Copper\n\nCopper, silver and gold are in group 11 of the periodic table, and they share certain attributes: they have one s-orbital electron on top of a filled d-electron shell and are characterized by high ductility and electrical conductivity. The filled d-shells in these elements do not contribute much to the i... |
5709614c200fba1400367f0d | What makes copper bondings weaker than other metals? | filled d-electron shell | [
"Copper\n\nCopper, silver and gold are in group 11 of the periodic table, and they share certain attributes: they have one s-orbital electron on top of a filled d-electron shell and are characterized by high ductility and electrical conductivity. The filled d-shells in these elements do not contribute much to the i... |
5709614c200fba1400367f0e | How is copper normally supplied? | fine-grained polycrystalline form | [
"Copper\n\nCopper, silver and gold are in group 11 of the periodic table, and they share certain attributes: they have one s-orbital electron on top of a filled d-electron shell and are characterized by high ductility and electrical conductivity. The filled d-shells in these elements do not contribute much to the i... |
5709614c200fba1400367f0f | What is a weaker form of copper than fine-grained polycrystalline? | monocrystalline forms | [
"Copper\n\nCopper, silver and gold are in group 11 of the periodic table, and they share certain attributes: they have one s-orbital electron on top of a filled d-electron shell and are characterized by high ductility and electrical conductivity. The filled d-shells in these elements do not contribute much to the i... |
570962e2ed30961900e8404e | What is the concentration of copper in the earths crust. | 50 parts per million | [
"Copper\n\nCopper is synthesized in massive stars and is present in the Earth's crust at a concentration of about 50 parts per million (ppm), where it occurs as native copper or in minerals such as the copper sulfides chalcopyrite and chalcocite, the copper carbonates azurite and malachite, and the copper(I) oxide ... |
570962e2ed30961900e8404f | How large was the biggest find of copper? | 420 tonnes | [
"Copper\n\nCopper is synthesized in massive stars and is present in the Earth's crust at a concentration of about 50 parts per million (ppm), where it occurs as native copper or in minerals such as the copper sulfides chalcopyrite and chalcocite, the copper carbonates azurite and malachite, and the copper(I) oxide ... |
570962e2ed30961900e84050 | What year was the largest find of copper discovered? | 1857 | [
"Copper\n\nCopper is synthesized in massive stars and is present in the Earth's crust at a concentration of about 50 parts per million (ppm), where it occurs as native copper or in minerals such as the copper sulfides chalcopyrite and chalcocite, the copper carbonates azurite and malachite, and the copper(I) oxide ... |
570962e2ed30961900e84051 | Where was the largest mass of copper found? | Michigan, US | [
"Copper\n\nCopper is synthesized in massive stars and is present in the Earth's crust at a concentration of about 50 parts per million (ppm), where it occurs as native copper or in minerals such as the copper sulfides chalcopyrite and chalcocite, the copper carbonates azurite and malachite, and the copper(I) oxide ... |
570962e2ed30961900e84052 | How big is the largest copper crystal that has been found? | 4.4×3.2×3.2 cm | [
"Copper\n\nCopper is synthesized in massive stars and is present in the Earth's crust at a concentration of about 50 parts per million (ppm), where it occurs as native copper or in minerals such as the copper sulfides chalcopyrite and chalcocite, the copper carbonates azurite and malachite, and the copper(I) oxide ... |
57096523ed30961900e8408c | What was copper called in Greece? | chalkos | [
"Copper\n\nIn Greece, copper was known by the name chalkos (χαλκός). It was an important resource for the Romans, Greeks and other ancient peoples. In Roman times, it was known as aes Cyprium, aes being the generic Latin term for copper alloys and Cyprium from Cyprus, where much copper was mined. The phrase was sim... |
57096523ed30961900e8408d | In what area was copper first mined? | Cyprus | [
"Copper\n\nIn Greece, copper was known by the name chalkos (χαλκός). It was an important resource for the Romans, Greeks and other ancient peoples. In Roman times, it was known as aes Cyprium, aes being the generic Latin term for copper alloys and Cyprium from Cyprus, where much copper was mined. The phrase was sim... |
57096523ed30961900e8408e | What is the Greek goddess that symbolizes copper? | Aphrodite | [
"Copper\n\nIn Greece, copper was known by the name chalkos (χαλκός). It was an important resource for the Romans, Greeks and other ancient peoples. In Roman times, it was known as aes Cyprium, aes being the generic Latin term for copper alloys and Cyprium from Cyprus, where much copper was mined. The phrase was sim... |
57096523ed30961900e8408f | What is the Roman goddess that symbolizes copper? | Venus | [
"Copper\n\nIn Greece, copper was known by the name chalkos (χαλκός). It was an important resource for the Romans, Greeks and other ancient peoples. In Roman times, it was known as aes Cyprium, aes being the generic Latin term for copper alloys and Cyprium from Cyprus, where much copper was mined. The phrase was sim... |
57096523ed30961900e84090 | What property does copper have that links it to Aphrodite and Venus? | lustrous beauty | [
"Copper\n\nIn Greece, copper was known by the name chalkos (χαλκός). It was an important resource for the Romans, Greeks and other ancient peoples. In Roman times, it was known as aes Cyprium, aes being the generic Latin term for copper alloys and Cyprium from Cyprus, where much copper was mined. The phrase was sim... |
570967d5200fba1400367f63 | What are compounds that have a carbon-copper bond called? | organocopper compounds | [
"Copper\n\nCompounds that contain a carbon-copper bond are known as organocopper compounds. They are very reactive towards oxygen to form copper(I) oxide and have many uses in chemistry. They are synthesized by treating copper(I) compounds with Grignard reagents, terminal alkynes or organolithium reagents; in parti... |
570967d5200fba1400367f64 | What does organocopper compounds reactions toward oxygen form? | copper(I) oxide | [
"Copper\n\nCompounds that contain a carbon-copper bond are known as organocopper compounds. They are very reactive towards oxygen to form copper(I) oxide and have many uses in chemistry. They are synthesized by treating copper(I) compounds with Grignard reagents, terminal alkynes or organolithium reagents; in parti... |
570967d5200fba1400367f65 | What is produced when copper compounds are treated with organolithium reagents? | Gilman reagent | [
"Copper\n\nCompounds that contain a carbon-copper bond are known as organocopper compounds. They are very reactive towards oxygen to form copper(I) oxide and have many uses in chemistry. They are synthesized by treating copper(I) compounds with Grignard reagents, terminal alkynes or organolithium reagents; in parti... |
570967d5200fba1400367f66 | Coupling products can be made by substituting Gilman reagent with what? | alkyl halides | [
"Copper\n\nCompounds that contain a carbon-copper bond are known as organocopper compounds. They are very reactive towards oxygen to form copper(I) oxide and have many uses in chemistry. They are synthesized by treating copper(I) compounds with Grignard reagents, terminal alkynes or organolithium reagents; in parti... |
570967d5200fba1400367f67 | Which form of copper is shock sensitive? | Copper(I) acetylide | [
"Copper\n\nCompounds that contain a carbon-copper bond are known as organocopper compounds. They are very reactive towards oxygen to form copper(I) oxide and have many uses in chemistry. They are synthesized by treating copper(I) compounds with Grignard reagents, terminal alkynes or organolithium reagents; in parti... |
57096959200fba1400367f89 | Who used copper to produce art? | Renaissance sculptors | [
"Copper\n\nThe uses of copper in art were not limited to currency: it was used by Renaissance sculptors, in photographic technology known as the daguerreotype, and the Statue of Liberty. Copper plating and copper sheathing for ships' hulls was widespread; the ships of Christopher Columbus were among the earliest to... |
57096959200fba1400367f8a | What is the photographic technology that uses copper called? | daguerreotype | [
"Copper\n\nThe uses of copper in art were not limited to currency: it was used by Renaissance sculptors, in photographic technology known as the daguerreotype, and the Statue of Liberty. Copper plating and copper sheathing for ships' hulls was widespread; the ships of Christopher Columbus were among the earliest to... |
57096959200fba1400367f8b | What famous NY city landmark is made from copper? | Statue of Liberty | [
"Copper\n\nThe uses of copper in art were not limited to currency: it was used by Renaissance sculptors, in photographic technology known as the daguerreotype, and the Statue of Liberty. Copper plating and copper sheathing for ships' hulls was widespread; the ships of Christopher Columbus were among the earliest to... |
57096959200fba1400367f8c | What famous explorers ships was one of the first to have it's hulls made of copper? | Christopher Columbus | [
"Copper\n\nThe uses of copper in art were not limited to currency: it was used by Renaissance sculptors, in photographic technology known as the daguerreotype, and the Statue of Liberty. Copper plating and copper sheathing for ships' hulls was widespread; the ships of Christopher Columbus were among the earliest to... |
57096959200fba1400367f8d | When did The Norddeutsche Affinerie electroplating plant first begin production? | 1830 | [
"Copper\n\nThe uses of copper in art were not limited to currency: it was used by Renaissance sculptors, in photographic technology known as the daguerreotype, and the Statue of Liberty. Copper plating and copper sheathing for ships' hulls was widespread; the ships of Christopher Columbus were among the earliest to... |
57096ba1200fba1400367fb1 | What property of copper increases the efficiency of electrical motors? | conductivity | [
"Copper\n\nCopper's greater conductivity versus other metals enhances the electrical energy efficiency of motors. This is important because motors and motor-driven systems account for 43%-46% of all global electricity consumption and 69% of all electricity used by industry. Increasing the mass and cross section of ... |
57096ba1200fba1400367fb2 | What percentage of electrical consumption does motor systems use globally? | 43%-46% | [
"Copper\n\nCopper's greater conductivity versus other metals enhances the electrical energy efficiency of motors. This is important because motors and motor-driven systems account for 43%-46% of all global electricity consumption and 69% of all electricity used by industry. Increasing the mass and cross section of ... |
57096ba1200fba1400367fb3 | What percentage of electrical consumption does motor systems use in industry? | 69% | [
"Copper\n\nCopper's greater conductivity versus other metals enhances the electrical energy efficiency of motors. This is important because motors and motor-driven systems account for 43%-46% of all global electricity consumption and 69% of all electricity used by industry. Increasing the mass and cross section of ... |
57096ba1200fba1400367fb4 | What does the acronym NEMA stand for? | National Electrical Manufacturers Association | [
"Copper\n\nCopper's greater conductivity versus other metals enhances the electrical energy efficiency of motors. This is important because motors and motor-driven systems account for 43%-46% of all global electricity consumption and 69% of all electricity used by industry. Increasing the mass and cross section of ... |
57096ba1200fba1400367fb5 | By using copper motor rotor technology it is allowing industry to exceed what standards? | efficiency standards | [
"Copper\n\nCopper's greater conductivity versus other metals enhances the electrical energy efficiency of motors. This is important because motors and motor-driven systems account for 43%-46% of all global electricity consumption and 69% of all electricity used by industry. Increasing the mass and cross section of ... |
57096cd6ed30961900e840e8 | Name a compond that can mobilize sold copper? | Chromobacterium violaceum | [
"Copper\n\nChromobacterium violaceum and Pseudomonas fluorescens can both mobilize solid copper, as a cyanide compound. The ericoid mycorrhizal fungi associated with Calluna, Erica and Vaccinium can grow in copper metalliferous soils. The ectomycorrhizal fungus Suillus luteus protects young pine trees from copper t... |
57096cd6ed30961900e840e9 | What fungi can grow in copper metalliferous soils? | ericoid mycorrhizal fungi | [
"Copper\n\nChromobacterium violaceum and Pseudomonas fluorescens can both mobilize solid copper, as a cyanide compound. The ericoid mycorrhizal fungi associated with Calluna, Erica and Vaccinium can grow in copper metalliferous soils. The ectomycorrhizal fungus Suillus luteus protects young pine trees from copper t... |
57096cd6ed30961900e840ea | What fungus protects pine trees from copper toxicity? | Suillus luteus | [
"Copper\n\nChromobacterium violaceum and Pseudomonas fluorescens can both mobilize solid copper, as a cyanide compound. The ericoid mycorrhizal fungi associated with Calluna, Erica and Vaccinium can grow in copper metalliferous soils. The ectomycorrhizal fungus Suillus luteus protects young pine trees from copper t... |
57096cd6ed30961900e840eb | What fungus grows from gold mining solution? | Aspergillus niger | [
"Copper\n\nChromobacterium violaceum and Pseudomonas fluorescens can both mobilize solid copper, as a cyanide compound. The ericoid mycorrhizal fungi associated with Calluna, Erica and Vaccinium can grow in copper metalliferous soils. The ectomycorrhizal fungus Suillus luteus protects young pine trees from copper t... |
57096cd6ed30961900e840ec | What fungus helps to soften heavy metal sulfides? | fungus Aspergillus | [
"Copper\n\nChromobacterium violaceum and Pseudomonas fluorescens can both mobilize solid copper, as a cyanide compound. The ericoid mycorrhizal fungi associated with Calluna, Erica and Vaccinium can grow in copper metalliferous soils. The ectomycorrhizal fungus Suillus luteus protects young pine trees from copper t... |
57096ee9ed30961900e8410c | What is an intrinsic property of copper-alloy touch surfaces? | antimicrobial | [
"Copper\n\nCopper-alloy touch surfaces have natural intrinsic properties to destroy a wide range of microorganisms (e.g., E. coli O157:H7, methicillin-resistant Staphylococcus aureus (MRSA), Staphylococcus, Clostridium difficile, influenza A virus, adenovirus, and fungi). Some 355 copper alloys were proven to kill ... |
57096ee9ed30961900e8410d | 355 copper alloys have been proven to kill what percentage of bacteria? | 99.9% | [
"Copper\n\nCopper-alloy touch surfaces have natural intrinsic properties to destroy a wide range of microorganisms (e.g., E. coli O157:H7, methicillin-resistant Staphylococcus aureus (MRSA), Staphylococcus, Clostridium difficile, influenza A virus, adenovirus, and fungi). Some 355 copper alloys were proven to kill ... |
57096ee9ed30961900e8410e | What does the acronym EPA stand for? | Environmental Protection Agency | [
"Copper\n\nCopper-alloy touch surfaces have natural intrinsic properties to destroy a wide range of microorganisms (e.g., E. coli O157:H7, methicillin-resistant Staphylococcus aureus (MRSA), Staphylococcus, Clostridium difficile, influenza A virus, adenovirus, and fungi). Some 355 copper alloys were proven to kill ... |
57096ee9ed30961900e8410f | How many copper alloys has the EPA approved as antimicrobial materials? | 355 | [
"Copper\n\nCopper-alloy touch surfaces have natural intrinsic properties to destroy a wide range of microorganisms (e.g., E. coli O157:H7, methicillin-resistant Staphylococcus aureus (MRSA), Staphylococcus, Clostridium difficile, influenza A virus, adenovirus, and fungi). Some 355 copper alloys were proven to kill ... |
57096ee9ed30961900e84110 | What disease do hospitals hope to prevent by installing copper doornobs? | Legionnaires' disease | [
"Copper\n\nCopper-alloy touch surfaces have natural intrinsic properties to destroy a wide range of microorganisms (e.g., E. coli O157:H7, methicillin-resistant Staphylococcus aureus (MRSA), Staphylococcus, Clostridium difficile, influenza A virus, adenovirus, and fungi). Some 355 copper alloys were proven to kill ... |
570970afed30961900e8413c | What are copper compounds in liquid form used for? | wood preservative | [
"Copper\n\nCopper compounds in liquid form are used as a wood preservative, particularly in treating original portion of structures during restoration of damage due to dry rot. Together with zinc, copper wires may be placed over non-conductive roofing materials to discourage the growth of moss.[citation needed] Tex... |
570970afed30961900e8413d | What does copper wires along with zinc on roofs help to prevent? | moss | [
"Copper\n\nCopper compounds in liquid form are used as a wood preservative, particularly in treating original portion of structures during restoration of damage due to dry rot. Together with zinc, copper wires may be placed over non-conductive roofing materials to discourage the growth of moss.[citation needed] Tex... |
570970afed30961900e8413e | What function does copper serve when used in textile fibers? | antimicrobial protective fabrics | [
"Copper\n\nCopper compounds in liquid form are used as a wood preservative, particularly in treating original portion of structures during restoration of damage due to dry rot. Together with zinc, copper wires may be placed over non-conductive roofing materials to discourage the growth of moss.[citation needed] Tex... |
570970afed30961900e8413f | How is copper used with nickel? | as a base | [
"Copper\n\nCopper compounds in liquid form are used as a wood preservative, particularly in treating original portion of structures during restoration of damage due to dry rot. Together with zinc, copper wires may be placed over non-conductive roofing materials to discourage the growth of moss.[citation needed] Tex... |
570970afed30961900e84140 | What is used to treat structures for dry rot? | Copper compounds | [
"Copper\n\nCopper compounds in liquid form are used as a wood preservative, particularly in treating original portion of structures during restoration of damage due to dry rot. Together with zinc, copper wires may be placed over non-conductive roofing materials to discourage the growth of moss.[citation needed] Tex... |
570971cb200fba1400368003 | How long has copper been in use? | at least 10,000 years | [
"Copper\n\nCopper has been in use at least 10,000 years, but more than 95% of all copper ever mined and smelted has been extracted since 1900, and more than half was extracted in only the last 24 years. As with many natural resources, the total amount of copper on Earth is vast (around 1014 tons just in the top kil... |
570971cb200fba1400368004 | What percentage of copper has been extracted since 1900? | 95% | [
"Copper\n\nCopper has been in use at least 10,000 years, but more than 95% of all copper ever mined and smelted has been extracted since 1900, and more than half was extracted in only the last 24 years. As with many natural resources, the total amount of copper on Earth is vast (around 1014 tons just in the top kil... |
570971cb200fba1400368005 | How much of mined cooper has been extracted in the last 24 years? | more than half | [
"Copper\n\nCopper has been in use at least 10,000 years, but more than 95% of all copper ever mined and smelted has been extracted since 1900, and more than half was extracted in only the last 24 years. As with many natural resources, the total amount of copper on Earth is vast (around 1014 tons just in the top kil... |
570971cb200fba1400368006 | How much copper is estimated to exsist on earth? | 1014 tons | [
"Copper\n\nCopper has been in use at least 10,000 years, but more than 95% of all copper ever mined and smelted has been extracted since 1900, and more than half was extracted in only the last 24 years. As with many natural resources, the total amount of copper on Earth is vast (around 1014 tons just in the top kil... |
570971cb200fba1400368007 | What is a major source of cooper in modern times? | Recycling | [
"Copper\n\nCopper has been in use at least 10,000 years, but more than 95% of all copper ever mined and smelted has been extracted since 1900, and more than half was extracted in only the last 24 years. As with many natural resources, the total amount of copper on Earth is vast (around 1014 tons just in the top kil... |
57097382ed30961900e8417e | What did Romans use as money in the 6th through 3rd centuriesBC? | copper lumps | [
"Copper\n\nThe cultural role of copper has been important, particularly in currency. Romans in the 6th through 3rd centuries BC used copper lumps as money. At first, the copper itself was valued, but gradually the shape and look of the copper became more important. Julius Caesar had his own coins made from brass, w... |
57097382ed30961900e8417f | Who had his own coins produced out of brass? | Julius Caesar | [
"Copper\n\nThe cultural role of copper has been important, particularly in currency. Romans in the 6th through 3rd centuries BC used copper lumps as money. At first, the copper itself was valued, but gradually the shape and look of the copper became more important. Julius Caesar had his own coins made from brass, w... |
57097382ed30961900e84180 | During the 6th through 3rd centuries BC how much copper was mined in Rome? | 15,000 t | [
"Copper\n\nThe cultural role of copper has been important, particularly in currency. Romans in the 6th through 3rd centuries BC used copper lumps as money. At first, the copper itself was valued, but gradually the shape and look of the copper became more important. Julius Caesar had his own coins made from brass, w... |
57097382ed30961900e84181 | Cctavianus Augustus Caesar had his coins made out of what alloys? | Cu-Pb-Sn alloys | [
"Copper\n\nThe cultural role of copper has been important, particularly in currency. Romans in the 6th through 3rd centuries BC used copper lumps as money. At first, the copper itself was valued, but gradually the shape and look of the copper became more important. Julius Caesar had his own coins made from brass, w... |
57097382ed30961900e84182 | What became more important than the copper value for Roman coins? | the shape and look | [
"Copper\n\nThe cultural role of copper has been important, particularly in currency. Romans in the 6th through 3rd centuries BC used copper lumps as money. At first, the copper itself was valued, but gradually the shape and look of the copper became more important. Julius Caesar had his own coins made from brass, w... |
570974d8200fba140036801f | What percentage of copper is used in electrical wires? | 60% | [
"Copper\n\nThe major applications of copper are in electrical wires (60%), roofing and plumbing (20%) and industrial machinery (15%). Copper is mostly used as a pure metal, but when a higher hardness is required it is combined with other elements to make an alloy (5% of total use) such as brass and bronze. A small ... |
570974d8200fba1400368020 | What percentage of copper is used in roofing and plumbing? | 20% | [
"Copper\n\nThe major applications of copper are in electrical wires (60%), roofing and plumbing (20%) and industrial machinery (15%). Copper is mostly used as a pure metal, but when a higher hardness is required it is combined with other elements to make an alloy (5% of total use) such as brass and bronze. A small ... |
570974d8200fba1400368021 | What percentage of copper is used in industrial machinery? | 15% | [
"Copper\n\nThe major applications of copper are in electrical wires (60%), roofing and plumbing (20%) and industrial machinery (15%). Copper is mostly used as a pure metal, but when a higher hardness is required it is combined with other elements to make an alloy (5% of total use) such as brass and bronze. A small ... |
570974d8200fba1400368022 | What property does combining copper with brass or bronze create? | hardness | [
"Copper\n\nThe major applications of copper are in electrical wires (60%), roofing and plumbing (20%) and industrial machinery (15%). Copper is mostly used as a pure metal, but when a higher hardness is required it is combined with other elements to make an alloy (5% of total use) such as brass and bronze. A small ... |
570974d8200fba1400368023 | What is a metal that copper is combined with to create a greater hardness? | brass | [
"Copper\n\nThe major applications of copper are in electrical wires (60%), roofing and plumbing (20%) and industrial machinery (15%). Copper is mostly used as a pure metal, but when a higher hardness is required it is combined with other elements to make an alloy (5% of total use) such as brass and bronze. A small ... |
57097747200fba1400368029 | What is the explanation for copper's capacity for electrical conductivity? | The softness | [
"Copper\n\nThe softness of copper partly explains its high electrical conductivity (59.6×106 S/m) and thus also high thermal conductivity, which are the second highest (to silver) among pure metals at room temperature. This is because the resistivity to electron transport in metals at room temperature mostly origin... |
57097747200fba140036802a | What metal has a higher thermal conductivity than copper? | silver | [
"Copper\n\nThe softness of copper partly explains its high electrical conductivity (59.6×106 S/m) and thus also high thermal conductivity, which are the second highest (to silver) among pure metals at room temperature. This is because the resistivity to electron transport in metals at room temperature mostly origin... |
57097747200fba140036802b | What is the maximum premissible current density in open air of copper? | 3.1×106 A/m2 | [
"Copper\n\nThe softness of copper partly explains its high electrical conductivity (59.6×106 S/m) and thus also high thermal conductivity, which are the second highest (to silver) among pure metals at room temperature. This is because the resistivity to electron transport in metals at room temperature mostly origin... |
57097747200fba140036802c | What occurs when copper is placed touching another metal? | corrosion | [
"Copper\n\nThe softness of copper partly explains its high electrical conductivity (59.6×106 S/m) and thus also high thermal conductivity, which are the second highest (to silver) among pure metals at room temperature. This is because the resistivity to electron transport in metals at room temperature mostly origin... |
57097747200fba140036802d | What happens to copper if an electrical current gets too high? | it begins to heat excessively | [
"Copper\n\nThe softness of copper partly explains its high electrical conductivity (59.6×106 S/m) and thus also high thermal conductivity, which are the second highest (to silver) among pure metals at room temperature. This is because the resistivity to electron transport in metals at room temperature mostly origin... |
570978be200fba1400368039 | In what form is copper extracted? | copper sulfides | [
"Copper\n\nMost copper is mined or extracted as copper sulfides from large open pit mines in porphyry copper deposits that contain 0.4 to 1.0% copper. Examples include Chuquicamata in Chile, Bingham Canyon Mine in Utah, United States and El Chino Mine in New Mexico, United States. According to the British Geologica... |
570978be200fba140036803a | From what types of mines is copper extracted? | open pit mines | [
"Copper\n\nMost copper is mined or extracted as copper sulfides from large open pit mines in porphyry copper deposits that contain 0.4 to 1.0% copper. Examples include Chuquicamata in Chile, Bingham Canyon Mine in Utah, United States and El Chino Mine in New Mexico, United States. According to the British Geologica... |
570978be200fba140036803b | What percentage of copper do the deposits have that are extracted? | 0.4 to 1.0% copper | [
"Copper\n\nMost copper is mined or extracted as copper sulfides from large open pit mines in porphyry copper deposits that contain 0.4 to 1.0% copper. Examples include Chuquicamata in Chile, Bingham Canyon Mine in Utah, United States and El Chino Mine in New Mexico, United States. According to the British Geologica... |
570978be200fba140036803c | What country was the top producer of copper in 2005? | Chile | [
"Copper\n\nMost copper is mined or extracted as copper sulfides from large open pit mines in porphyry copper deposits that contain 0.4 to 1.0% copper. Examples include Chuquicamata in Chile, Bingham Canyon Mine in Utah, United States and El Chino Mine in New Mexico, United States. According to the British Geologica... |
570978be200fba140036803d | What is the name of the process being considered in Arizona that allows copper to be recovered? | in-situ leach process | [
"Copper\n\nMost copper is mined or extracted as copper sulfides from large open pit mines in porphyry copper deposits that contain 0.4 to 1.0% copper. Examples include Chuquicamata in Chile, Bingham Canyon Mine in Utah, United States and El Chino Mine in New Mexico, United States. According to the British Geologica... |
57097a0bed30961900e841ca | What percent of copper is recyclable? | 100% | [
"Copper\n\nLike aluminium, copper is 100% recyclable without any loss of quality, regardless of whether it is in a raw state or contained in a manufactured product. In volume, copper is the third most recycled metal after iron and aluminium. It is estimated that 80% of the copper ever mined is still in use today. A... |
57097a0bed30961900e841cb | What percentage of copper that has been mined is still being used today? | 80% | [
"Copper\n\nLike aluminium, copper is 100% recyclable without any loss of quality, regardless of whether it is in a raw state or contained in a manufactured product. In volume, copper is the third most recycled metal after iron and aluminium. It is estimated that 80% of the copper ever mined is still in use today. A... |
57097a0bed30961900e841cc | What other metal besides copper is 100% recyclable? | aluminium | [
"Copper\n\nLike aluminium, copper is 100% recyclable without any loss of quality, regardless of whether it is in a raw state or contained in a manufactured product. In volume, copper is the third most recycled metal after iron and aluminium. It is estimated that 80% of the copper ever mined is still in use today. A... |
57097a0bed30961900e841cd | Name a metal that is recycled more often than copper? | aluminium | [
"Copper\n\nLike aluminium, copper is 100% recyclable without any loss of quality, regardless of whether it is in a raw state or contained in a manufactured product. In volume, copper is the third most recycled metal after iron and aluminium. It is estimated that 80% of the copper ever mined is still in use today. A... |
57097a0bed30961900e841ce | What is the amount of copper in use, per capita, globally? | 35–55 kg | [
"Copper\n\nLike aluminium, copper is 100% recyclable without any loss of quality, regardless of whether it is in a raw state or contained in a manufactured product. In volume, copper is the third most recycled metal after iron and aluminium. It is estimated that 80% of the copper ever mined is still in use today. A... |
57097f5e200fba1400368091 | What pigment color is natural to copper? | green | [
"Copper\n\nThe metal's distinctive natural green patina has long been coveted by architects and designers. The final patina is a particularly durable layer that is highly resistant to atmospheric corrosion, thereby protecting the underlying metal against further weathering. It can be a mixture of carbonate and sulf... |
57097f5e200fba1400368092 | What property does the final patina on cooper have? | highly resistant to atmospheric corrosion | [
"Copper\n\nThe metal's distinctive natural green patina has long been coveted by architects and designers. The final patina is a particularly durable layer that is highly resistant to atmospheric corrosion, thereby protecting the underlying metal against further weathering. It can be a mixture of carbonate and sulf... |
57097f5e200fba1400368093 | What mixture of compounds is the final patina? | carbonate and sulfate | [
"Copper\n\nThe metal's distinctive natural green patina has long been coveted by architects and designers. The final patina is a particularly durable layer that is highly resistant to atmospheric corrosion, thereby protecting the underlying metal against further weathering. It can be a mixture of carbonate and sulf... |
57097f5e200fba1400368094 | What conditions effect the mixture of carbonate and sulfate in copper? | environmental | [
"Copper\n\nThe metal's distinctive natural green patina has long been coveted by architects and designers. The final patina is a particularly durable layer that is highly resistant to atmospheric corrosion, thereby protecting the underlying metal against further weathering. It can be a mixture of carbonate and sulf... |
57097f5e200fba1400368095 | What can be done to copper to give it a certain look? | finished | [
"Copper\n\nThe metal's distinctive natural green patina has long been coveted by architects and designers. The final patina is a particularly durable layer that is highly resistant to atmospheric corrosion, thereby protecting the underlying metal against further weathering. It can be a mixture of carbonate and sulf... |
57098140200fba14003680cb | What are copper salts sometimes used for? | suicide attempts | [
"Copper\n\nGram quantities of various copper salts have been taken in suicide attempts and produced acute copper toxicity in humans, possibly due to redox cycling and the generation of reactive oxygen species that damage DNA. Corresponding amounts of copper salts (30 mg/kg) are toxic in animals. A minimum dietary v... |
57098140200fba14003680cc | When ingested in large amounts what does copper salts produce in humans? | copper toxicity | [
"Copper\n\nGram quantities of various copper salts have been taken in suicide attempts and produced acute copper toxicity in humans, possibly due to redox cycling and the generation of reactive oxygen species that damage DNA. Corresponding amounts of copper salts (30 mg/kg) are toxic in animals. A minimum dietary v... |
57098140200fba14003680cd | What is the minimum amount of copper rabbits should have in their diet? | 3 ppm | [
"Copper\n\nGram quantities of various copper salts have been taken in suicide attempts and produced acute copper toxicity in humans, possibly due to redox cycling and the generation of reactive oxygen species that damage DNA. Corresponding amounts of copper salts (30 mg/kg) are toxic in animals. A minimum dietary v... |
57098140200fba14003680ce | What is a major benefit to rabbits having a higher concentration of copper in their diet? | growth rates | [
"Copper\n\nGram quantities of various copper salts have been taken in suicide attempts and produced acute copper toxicity in humans, possibly due to redox cycling and the generation of reactive oxygen species that damage DNA. Corresponding amounts of copper salts (30 mg/kg) are toxic in animals. A minimum dietary v... |
57098140200fba14003680cf | What amount of copper salt is toxic in animals? | 30 mg/kg | [
"Copper\n\nGram quantities of various copper salts have been taken in suicide attempts and produced acute copper toxicity in humans, possibly due to redox cycling and the generation of reactive oxygen species that damage DNA. Corresponding amounts of copper salts (30 mg/kg) are toxic in animals. A minimum dietary v... |
5709828fed30961900e84244 | When did Britain first use brass? | 3rd–2nd century BC | [
"Copper\n\nBritain's first use of brass occurred around the 3rd–2nd century BC. In North America, copper mining began with marginal workings by Native Americans. Native copper is known to have been extracted from sites on Isle Royale with primitive stone tools between 800 and 1600. Copper metallurgy was flourishing... |
5709828fed30961900e84245 | Who were the first copper miners in North America? | Native Americans | [
"Copper\n\nBritain's first use of brass occurred around the 3rd–2nd century BC. In North America, copper mining began with marginal workings by Native Americans. Native copper is known to have been extracted from sites on Isle Royale with primitive stone tools between 800 and 1600. Copper metallurgy was flourishing... |
5709828fed30961900e84246 | Where was native copper extracted with primitive tools between 800 and 1600? | Isle Royale | [
"Copper\n\nBritain's first use of brass occurred around the 3rd–2nd century BC. In North America, copper mining began with marginal workings by Native Americans. Native copper is known to have been extracted from sites on Isle Royale with primitive stone tools between 800 and 1600. Copper metallurgy was flourishing... |
5709828fed30961900e84247 | What country had a strong copper production in 1000 AD | Peru | [
"Copper\n\nBritain's first use of brass occurred around the 3rd–2nd century BC. In North America, copper mining began with marginal workings by Native Americans. Native copper is known to have been extracted from sites on Isle Royale with primitive stone tools between 800 and 1600. Copper metallurgy was flourishing... |
5709828fed30961900e84248 | When did commercial production of copper begin? | early 20th century | [
"Copper\n\nBritain's first use of brass occurred around the 3rd–2nd century BC. In North America, copper mining began with marginal workings by Native Americans. Native copper is known to have been extracted from sites on Isle Royale with primitive stone tools between 800 and 1600. Copper metallurgy was flourishing... |
5709844f200fba1400368107 | How many isotopes are there of copper? | 29 | [
"Copper\n\nThere are 29 isotopes of copper. 63Cu and 65Cu are stable, with 63Cu comprising approximately 69% of naturally occurring copper; they both have a spin of 3⁄2. The other isotopes are radioactive, with the most stable being 67Cu with a half-life of 61.83 hours. Seven metastable isotopes have been character... |
5709844f200fba1400368108 | What are the two stable isotopes of cooper? | 63Cu and 65Cu | [
"Copper\n\nThere are 29 isotopes of copper. 63Cu and 65Cu are stable, with 63Cu comprising approximately 69% of naturally occurring copper; they both have a spin of 3⁄2. The other isotopes are radioactive, with the most stable being 67Cu with a half-life of 61.83 hours. Seven metastable isotopes have been character... |
5709844f200fba1400368109 | Which isotope makes up about 69% of natural copper? | 63Cu | [
"Copper\n\nThere are 29 isotopes of copper. 63Cu and 65Cu are stable, with 63Cu comprising approximately 69% of naturally occurring copper; they both have a spin of 3⁄2. The other isotopes are radioactive, with the most stable being 67Cu with a half-life of 61.83 hours. Seven metastable isotopes have been character... |
5709844f200fba140036810a | What is the half life of the copper isotope 68mCu? | 3.8 minutes | [
"Copper\n\nThere are 29 isotopes of copper. 63Cu and 65Cu are stable, with 63Cu comprising approximately 69% of naturally occurring copper; they both have a spin of 3⁄2. The other isotopes are radioactive, with the most stable being 67Cu with a half-life of 61.83 hours. Seven metastable isotopes have been character... |
5709844f200fba140036810b | What is the half life of the copper isotope 67Cu? | 61.83 hours | [
"Copper\n\nThere are 29 isotopes of copper. 63Cu and 65Cu are stable, with 63Cu comprising approximately 69% of naturally occurring copper; they both have a spin of 3⁄2. The other isotopes are radioactive, with the most stable being 67Cu with a half-life of 61.83 hours. Seven metastable isotopes have been character... |
5709867b200fba1400368143 | What is the alloy of copper and nickel called? | cupronickel | [
"Copper\n\nThe alloy of copper and nickel, called cupronickel, is used in low-denomination coins, often for the outer cladding. The US 5-cent coin called a nickel consists of 75% copper and 25% nickel and has a homogeneous composition. The alloy consisting of 90% copper and 10% nickel is remarkable for its resistan... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.