Chemistry
What are proteins that help speed up chemical reactions called?
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What is the second-most abundant element in the universe, though it is much less common on Earth?
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What are substances that control the rates of chemical reactions?
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What symbol appears on the periodic table for the element with the atomic number 88?
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Which element is a poisonous gas that combines with sodium to form table salt?
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Silver chloride and silver nitrate are both chemicals that darken with exposure to what?
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Gold, silver, lead, and copper exhibit the properties of which of the following crystal systems?
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