Question

1. which is not a diatomic molecule?

boron
nitrogen
fluorine
bromine

Explanation:

Diatomic molecules consist of two atoms. Nitrogen (\(N_2\)), fluorine (\(F_2\)), and bromine (\(Br_2\)) are diatomic. Boron is a solid at room - temperature and does not form diatomic molecules under standard conditions.

Answer:

Boron