Chemistry
What symbol appears on the periodic table for Thorium which has the atomic number 90?
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What is the third most abundant gas in the earth's atmosphere?
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Which of the following elements has the heaviest atomic weight?
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Which state of matter has molecules packed together tightly?
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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 the following items is most likely to be fortified with vitamins?
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How many elements in the actinide series are not radioactive?
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What metal is known for the chemical compounds it forms, such as emeralds and aquamarines?
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