What do you call the inside of an atom?

protons, neutrons, and electrons

Explanation:

protons have a positive charge, neutrons have a neutrel charge, and electrons have a negative charge

the reaction mixture contains some ammonia, plus a lot of unreacted nitrogen and hydrogen. the mixture is cooled and compressed, causing the ammonia gas to condense into a liquid. the liquefied ammonia is separated and removed. the unreacted nitrogen and hydrogen are then recycled back into the reactor .