Chemistry

Which of these is a heavy gas used in specialized electric lamps?

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If you crush a diamond, what color is the dust?
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What is a substance made from only one type of atom called?
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What is H20 more commonly known as?
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What is the common name of the chemical compound H2O?
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What is the symbol used on the periodic table for the element Fluorine?
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What energy is stored in the form of chemical compounds?
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How many pounds of carbon dioxide are produced when a car burns one gallon of gas?
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Which of the following activities is an example of changing a physical property?
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