Chemistry
What element gets its name from the Greek word "kryptos" meaning "the hidden one"?
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What symbol appears on the periodic table for Thorium which has the atomic number 90?
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What are organic compounds in which some of the bonding elements are delocalized?
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Most metals are gray in color; what is the only metal that is yellow?
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What symbol appears on the periodic table for the element with the atomic number 14?
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