Question

what is hydrogen??????​

Answer 1

Answer:

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.

Answer 2

Answer:

Hydrogen is a metal with atomic number 1. Hydrogen can be in the form of water or gas.

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