Question

difference between H2 & ,2H​

Answer 1

Answer:

Hola

Here's your answer-

H2 is a molecule of hydrogen gas whereas 2H represents two hydrogen atoms.

Hope it helps. :)

Answer 2

Answer:

$h_{2} \: means \: 2 \: hydrogen \: molecules \\ 2h \: means \: twice \: of \: hydrogen$