Chemistry
Under standard conditions, what periodic table group exists in all three main phases of matter?
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What is the most abundant halogen found in the Earth's crust?
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What is often used in advertising signs and produces a bright reddish-orange light?
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Which of these can take on either a positive or negative charge, typically being a protein?
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What two common ingredients cause an observable chemical reaction when mixed?
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What element is the basis for organic chemistry, as it occurs in all living organisms?
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What polyethylene bowls made Earl Tupper a millionaire?
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How many degrees of unsaturation are in the compound C2H4?
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