Chemistry
What is the fifth most abundant element in the universe after hydrogen, helium, oxygen and carbon?
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What is thermal energy that moves from warmer objects to cooler ones called?
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What symbol appears on the periodic table for Magnesium which has the atomic number 12?
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Which one of the following countries' names is derived from the element silver?
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What halogen is extremely rare and is considered one of the rarest naturally occurring elements on Earth?
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Clocks made out of what alkali metal are considered the most accurate of all clocks?
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