Write any two drawbacks of the octet theory.​

Octet rule fails to explain the following:

(1) The stability of incomplete octet molecules, i.e., the molecules with the central atom containing less than eight electrons. (2) The stability of expanded octet molecules, i.e., the molecules with the central atom containing more than eight electrons.

Explanation:

(1) The stability of incomplete octet molecules, i.e., the molecules with the central atom containing less than eight electrons.

(2) The stability of expanded octet molecules, i.e., the molecules with the central atom containing more than eight electrons

lithosphere and asthenosphere

dynamic equilibrium is the answer.