In 1912, chemist Fritz Haber developed a process that combined nitrogen from the air with hydrogen at high temperatures and pressures to make ammonia. Specifically, the process involved combining one molecule of nitrogen gas (N2) with three molecules of hydrogen gas (H2) to get two molecules of ammonia (NH3). If you write this process in a symbol format, it looks like this:

N2 + 3H2 → 2NH3

I wanted to ask about the number of atoms that are involved. I got an answer of 8 atoms before and after, but I wasn't completely sure.