| rdfs:comment | - User can create, shape and manipulate hydrogen, a colorless, odorless, tasteless, non-toxic, nonmetallic, highly combustible diatomic gas, the lightest of all gases and the most abundant element in the universe, that occurs as the diatomic molecule 2. Since hydrogen readily forms covalent compounds with most non-metallic elements, most of the hydrogen on Earth exists in molecular forms such as in the form of water or organic compounds.
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| abstract | - User can create, shape and manipulate hydrogen, a colorless, odorless, tasteless, non-toxic, nonmetallic, highly combustible diatomic gas, the lightest of all gases and the most abundant element in the universe, that occurs as the diatomic molecule 2. Since hydrogen readily forms covalent compounds with most non-metallic elements, most of the hydrogen on Earth exists in molecular forms such as in the form of water or organic compounds. It is used to synthesize ammonia, ethanol, aniline, and methanol; to treat petroleum fuels; as a reducing agent and to supply a reducing atmosphere; to make hydrogen chloride (hydrochloric acid) and hydrogen bromide. Liquid hydrogen (boiling point 423 F/252.8 C) is used in scientific and commercial applications to produce extremely low temperatures and as a rocket propellant and a fuel for fuel cells.
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