1) define hydrogen?
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Hydrogen (H), a colourless, odourless, tasteless, flammable gaseous substance that is the simplest member of the family of chemical elements. ... Under ordinary conditions, hydrogen gas is a loose aggregation of hydrogen molecules, each consisting of a pair of atoms, a diatomic molecule, H2
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it is the first element in the periodic table. defined as Hydrogen (H). the atomic number is 1. it has 1 electron and 1 proton.
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