Which element does not exist as a diatomic molecule?
Answer: Neon The common elements that exist as diatomic molecules at room temperature are hydrogen, nitrogen, oxygen, fluorine, chlorine, bromine, and iodine. Therefore, the element that does not exist as a diatomic molecule is neon.
Which of the following elements exists as a diatomic molecule?
The only chemical elements that form stable homonuclear diatomic molecules at standard temperature and pressure (STP) (or typical laboratory conditions of 1 bar and 25 ) are the gases hydrogen (H2), nitrogen (N2), oxygen (O2), fluorine (F2), and chlorine (Cl2).