Chemistry
What is the second most abundant element by mass (about 18.5%) in the human body?
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What element gets its name from the Greek word "kryptos" meaning "the hidden one"?
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What is the symbol used on the periodic table for the element Chlorine?
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What are organic compounds in which some of the bonding elements are delocalized?
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What is the third most abundant gas in the earth's atmosphere?
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What is the term for rain that contains chemical pollutants?
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Which three gas laws constitute the combined gas law (PV/T=pv/t)?
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What is the second most common metal on Earth, and the most widely-used metal?
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