Question

What do you mean by H2, and 2H?​

Answer 1

Answer:

H2 is Molecular hydrogen. It is a molecule of hydrogen that consists of two hydrogen atoms bonded together by one single bond (also known as a sigma bond). A subscript also denotes how many of a particular atom is in a molecule, thus H2 has two hydrogens. 2H, on the other hand, denotes two moles of elemental hydrogen.

Answer 2

Answer:

H2 means one molecule of hydrogen and 2H means two hydrogen atoms.