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March 18th, 2019 
adminHydrogen is the lightest element in .
It has 1, and the chemical symbol ##”H”##.
It is the most abundant element in the universe.
At standard temperature and pressure, hydrogen is a colorless, odorless, tasteless, non-toxic, nonmetallic, highly combustible gas.
It is present in almost all organic compounds.
Most of the hydrogen on earth exists in molecules of water (##”H”_2″O”##).
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