What are examples of chemical formulas representing a diatomic molecule?
Apart from the Noble Gases, ALL of the elemental gases are bimolecular..........
.........i.e. all of the elemental gases are diatomic molecules. Consider,
And all the halogens occur as diatomic molecules; except that bromine is a liquid, and iodine is a gas.
To reflect the molecularity, sometimes you will hear inorganic chemists refer to the bimolecular gases as
Note that there also exist a number of heteronuclear diatomic molecules, e.g.