• # question_answer 5) Explain the formation of a chemical bond.

Atoms combine to form chemical bonds to acquire a state of minimum energy. The state of minimum energy corresponds to state of maximum stability. Hence, the atoms combine with each other only if the process leads to lowering in energy. $n{{s}^{2}}n{{p}^{6}}(or\,1{{s}^{2}})$ represents a stable configuration and corresponds to maximum stability. Atoms combine to achieve this configuration.