[DesertRose]

HI,  when you are given equations or just elements, certain elements exist as diatomic molecules ( two atoms of that particular element). My question is this; how can you determine when an atom is a diatomic molecule or if it just exist in its regular state as one atom.

Example; hydrogen always exist as a diatomic molecule (H2). Whereas carbon monoxide does not (CO).

Could anyone guide me as to how to know this?-- Any help would be greatly appreciated!!
Thank you!

[Borek]

Carbon monoxide is a diatomic molecule.

I guess you mean - whch ELEMENTS exist as diatomic molecules.

H₂, N₂, O₂, F₂, Cl₂, Br₂, I₂.

[DesertRose]

So then ONLY when you see these elements in an equation, they ALONE exist as diatomic molecules?

thanks so much!