Chemistry
What is the symbol used on the periodic table for the element Promethium?
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What sort of change happens to a head of lettuce when you cut it in half?
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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 word is used to describe crops and foodstuffs grown without chemicals?
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Which of the following elements has the heaviest atomic weight?
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Which of these would be used to measure the volume of liquid in a glass?
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What is the fourth most abundant element in the universe by mass?
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What compound found in tap water is good for the teeth?
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