Question

What is hydrogen..??

XD
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Answer 1

Answer:

hi bhul gye mughe aap ya nahi

Answer 2

Answer:

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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.