Chemistry
What is the half-life of Potassium 40 as it decays to Argon?
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What is the approximate heat of vaporization of water at its boiling point?
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What element forms about 78% of Earth's atmosphere by volume?
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What noble gas has the lowest melting and boiling points of all the elements?
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What polyethylene bowls made Earl Tupper a millionaire?
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What symbol appears on the periodic table for the element with the atomic number 58?
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What is the stinky gas associated with swamps and anaerobic decomposition?
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