Chemistry
What kind of crystalline solid is a grain of sand?
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What is known as the energy required to start a chemical reaction?
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Oxygen can also be created by humans by using what process, where electricity passes through water?
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What is the symbol used on the periodic table for the element Protactinium?
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What element is the most ductile of the pure metals, but is less malleable than gold?
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What are proteins that help speed up chemical reactions called?
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Which is the major form of sugar used by living things as fuel?
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