Chemistry
What gas in excited state is responsible for the bright red and yellow-green colors of the aurora?
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Inhaling what gas temporarily makes the sound of a person's voice squeaky?
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The noble gases that make up Group XVIII of the periodic table is also known as which of the following?
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Analysis of the black soot left over from a fire would reveal what primary element?
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What is a combination of substances that still remain intact?
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Which of the following is a unit for measuring liquids?
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What is the spontaneous decay of atomic nuclei known as?
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