What does the term diatomic molecule mean

"Diatomic molecules" are molecules with only two atoms of the same or different chemical elements.

Explanation:

The "di" in the word is Greek and it means "two".

homonuclear: consists of two atoms of the same element. example is H₂ and O₂

heteronuclear: consists of two different atoms. example is CO and NO

definition of diatomic - Diatomic molecules or molecules made of two atoms chemically bonded together. The atoms can be of the same element (homonuclear molecules) or different elements (heteronuclear molecules)