Chemistry
What symbol appears on the periodic table for Magnesium which has the atomic number 12?
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What would you call the treatment of disease, usually cancer, by chemical agents?
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What volume does 24 grams of ammonia gas occupy at standard temperature and pressure?
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What is the second most abundant element by mass (about 18.5%) in the human body?
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What allotrope of oxygen helps protect the biosphere from solar ultraviolet radiation?
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