Question

what do the following symbols stand for? (a) H2 (b) 2H (c) 2h2​

Answer 1

Answer:

There is no difference in first two but in 3rd option it indicates that there is 4 hydrogen atoms.

Answer 2

H2 means two hydrogen atoms

2H stands for 2 atom of hydrogen.

2H2 means two molecules of hydrogen and four hydrogen atoms.