Question

What is the difference between an atom of hydrogen and a molecule of hydrogen?

Answer 1

Difference between an atom and a molecule of hydrogen:

1. An atom of hydrogen consists of a nucleus, a proton, and an electron and it cannot exist freely.
2. A molecule of Hydrogen has two hydrogen atoms bonded together (${\mathrm{H}}_2$) and it can exist freely.
3. A molecule of hydrogen consists of two protons, two neutrons, and two electrons, in total, combining the two atoms.