Question

define diatomic and triatomic and polyatomic molecule​

Answer 1

Diatomic - Diatomic molecules are those molecules that are composed of only two atoms. If a diatomic molecule is composed of the same element it is known as a homonuclear and if it is composed of two different elements it is known as heteronuclear.

Answer 2

Explanation:

Diatomic:- The elements that have two atoms are called as diatomic molecules. Example:- Oxygen. Triatomic:- The elements that have three atoms are called as tri-atomic elements. They are unstable. Example:- Ozone.