Science & Mathematics » Chemistry » Is KCl a heteronuclear diatomic molecule?

Is KCl a heteronuclear diatomic molecule?

Yes.
KCl consists of two different ions, K+ and Cl-, so it is diatomic.
KCl is heteronuclear because the atoms (ions) are different and therefore have different atomic numbers and hence different nuclei. K+ has 19 protons while Cl- has 17 protons.

An example of a homonuclear diatomic molecule would be Cl2.