What is mean by hydrogen
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a colourless, odourless, highly flammable gas, the chemical element of atomic number
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Explanation:
Hydrogen is the chemical element with the symbol H and atomic number 1. Hydrogen is the lightest element in the periodic table. At standard conditions hydrogen is a gas of diatomic molecules having the formula H₂. It is colorless, odorless, non-toxic, and highly combustible.
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