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Which of these is a heavy gas used in specialized electric lamps?
Chemistry
Which of these is a heavy gas used in specialized electric lamps?
Xenon
Hydrogen
Helium
Nitrous Oxide
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Which of these is an element?
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What alkali metal is used in batteries and certain medicines?
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What is the chemical symbol for Sodium?
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Which of these can take on either a positive or negative charge, typically being a protein?
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What kind of gas is CO2?
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