koi hai kya
ᴡʜᴀᴛ ɪs ʜʏᴅʀᴏɢᴇɴ???
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Answer:
hydrogen is highly reactive gas.
Hello Aunty ,
Ohh Sorry I mean Afreen xD
Good Morning.
Kase ho ??
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.
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