Chemistry
The first element on the periodic table of elements with an atomic number of 1 is?
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What element is the most ductile of the pure metals, but is less malleable than gold?
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What is the third most abundant gas in the earth's atmosphere?
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Acetone is present in which of the following products?
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Which of the following is the list of hydrogen halides of group 7A from highest boiling point to lowest?
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What is the fifth most abundant element in the universe after hydrogen, helium, oxygen and carbon?
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Which of the following metals is not known to start fires in the presence of water?
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