Chemistry
What is the sixth most abundant element on Earth, as well as the most abundant alkali metal?
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What makes matter expand when it's heated and contract when it's cooled?
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What kind of cell has a negative EMF and a positive Gibbs free energy?
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Which type of matter has definite volume but no definite shape?
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What branch of chemistry is concerned with the chemistry of living organisms?
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What is the fifth most abundant element in the universe after hydrogen, helium, oxygen and carbon?
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