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			July 20, 2008

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hydrogen, Compounds And Elements

Related Category: Compounds And Elements

hydrogen[hI´drujun] Pronunciation Key [Gr.,=water forming], gaseous chemical element; symbol H; at. no. 1; at. wt. 1.00794; m.p. -259.14°C; b.p. -252.87°C; density 0.08988 grams per liter at STP; valence usually +1.

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