Chemistry
What is the sixth most abundant element on Earth, as well as the most abundant alkali metal?
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What is the second-most abundant element in the universe, though it is much less common on Earth?
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What symbol appears on the periodic table for Thorium which has the atomic number 90?
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What is the term for rain that contains chemical pollutants?
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What word is used to describe crops and foodstuffs grown without chemicals?
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Which of the following is not a common brominating agent?
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What was the fifth unearthly element from the days of Aristotle?
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What is the molecular geometry of the molecule sulfur hexafluoride?
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What makes matter expand when it's heated and contract when it's cooled?
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