Which is a diatomic molecule? a. ar b. co c. co2 d. nacl

B. CO

Explanation:

Diatomic molecules are those that are formed by two atoms of the same chemical element (homonuclear diatomic molecule) or different chemical element (heteronuclear diatomic molecule).  

In this sense, oxygen is a homonuclear diatomic molecule because it is formed by two atoms of the same element () and Carbon monoxide () is heteronuclear diatomic molecule.

Sodium Chloride is not a diatomic molecule because is a product of ionization, but it can be diatomic in its gas phase with a polar covalent bond.

33: i think it’s b

so easy. just google the electromagnetic waves and it’ll pop up.