Chemistry
What element forms about 78% of Earth's atmosphere by volume?
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What happens to water when it gets close to freezing?
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What periodic table group has some properties in common with metals and some in common with non-metals?
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What process changes a rock's chemical composition to break it down?
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What symbol appears on the periodic table for Sulfur which has the atomic number 16?
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What kind of cell has a negative EMF and a positive Gibbs free energy?
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Which of these helps determine what state of matter a substance is in?
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