In bonding, main group elements gain, lose, or share electrons to attain the of the nearest noble gas neighbor to them in the periodic table.

The correct answer is: electronic configuration

Explanation:

The electronic configuration of a chemical element or molecule or ion refers to the arrangement or distribution of the electrons in the orbitals around the nucleus of an atom.

The noble gases are the stable chemical elements belonging to the group 18 of the periodic table. These elements are highly unreactive as they have full valence electron shells.

According to the octet rule, all the chemical elements tends to form a chemical bond in order to attain the noble gas electronic configuration.

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 .