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What is the second-most abundant element in the universe, though it is much less common on Earth?
Chemistry
What is the second-most abundant element in the universe, though it is much less common on Earth?
Nitrogen
Helium
Hydrogen
Fluorine
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Which of the following carries a positive charge?
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Which of these is a liquid?
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What is the most common chemical element found in the Earth's atmosphere?
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Which of the following metals is not known to start fires in the presence of water?
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Which of these helps determine what state of matter a substance is in?
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The red color of rubies is caused mainly by the presence of what element?
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What is the splitting of atomic nuclei called?
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Which of the following is the symbol for Iron?
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