Chemistry
What is the most abundant halogen found in the Earth's crust?
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What happens to water when it gets close to freezing?
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Orange street lighting is orange because of the presence of what element in the lamp?
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What gas in excited state is responsible for the bright red and yellow-green colors of the aurora?
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Most metals are gray in color; what is the only metal that is yellow?
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What phenomenon explains why cyclohexatriene does not exist?
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What occurs when molecules are evenly spread out in a space?
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Felix Hoffmann, not Bayer, first patented what remedy?
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