Question

no of nucleons in H2 molecule is​

Answer 1

Hydrogen has no neutron, deuterium has one, and tritium has two neutrons. The isotopes of hydrogen have, respectively, mass numbers of one, two, and three. Their nuclear symbols are therefore 1H, 2H, and 3H. The atoms of these isotopes have one electron to balance the charge of the one proton.

Answer 2

$\huge\bold{TWO\:\:NEUTRONS}$

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