Chemistry
What is the fifth most abundant element in the universe after hydrogen, helium, oxygen and carbon?
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Beryllium, magnesium, calcium, strontium, barium, and radium consist what group of elements?
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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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Which of the following best describes what water is?
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Silver chloride and silver nitrate are both chemicals that darken with exposure to what?
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Which mineral water company had to admit in 1990 that they artificially carbonated their product?
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What is the most abundant halogen found in the Earth's crust?
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What will happen to a bowl of ice cream left in the sun?
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Which of the following subshells has the highest energy?
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