what is hydrogen????
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Hydrogen is the chemical element with the symbol H and atomic number 1. With a standard atomic weight of 1.008, hydrogen is the lightest element in the periodic table. Hydrogen is the most abundant chemical substance in the universe, constituting roughly 75% of all baryonic mass.
Symbol: H
Atomic mass: 1.00784 u
Atomic number: 1
Electron configuration: 1s1
Van der Waals radius: 120 pm
Discoverer: Henry Cavendish
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