Chemistry
Praseodymium on the periodic table is noted by which symbol?
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What was the fifth unearthly element from the days of Aristotle?
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Which element has the highest boiling point at 5933.2 Kelvin?
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What is the fifth most abundant element in the universe after hydrogen, helium, oxygen and carbon?
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What are vast amounts of oil that have become trapped in one place called?
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What is the unit defined as the energy needed to raise one gram of water by 1 degree Celsius?
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What gas in excited state is responsible for the bright red and yellow-green colors of the aurora?
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