Chemistry
What is the fifth most abundant element in the universe after hydrogen, helium, oxygen and carbon?
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What makes matter expand when it's heated and contract when it's cooled?
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What is the breakdown of a material by separation of the layers of which it is composed called?
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What symbol appears on the periodic table for Beryllium which has the atomic number 4?
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Inhaling what gas temporarily makes the sound of a person's voice squeaky?
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