Chemistry

Which noble gas has "A" as its first letter?

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In evaporation, water turns into what?
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What metal is used in airplanes for its lightweight properties?
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Which of these is a heavy gas used in specialized electric lamps?
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What is the symbol used on the periodic table for the element Scandium?
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What is the abbreviation for an element called?
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What are the products of propanoic acid and ethanol when the two are combined with warm sulphuric acid?
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A critical component of vitamin B-12, what element is the only metal found in vitamins?
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What is the main active chemical in marijuana?
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