Depending on the types of atoms present in a molecule of a substance, molecules are classified as Homoatomic molecule and Heteroatomic molecule.
Homoatomic Molecule:
This type of molecule contains only one type of atom.
Eg. H2, O2, P4 etc.
Depending on the number of atoms present in a molecule, homoatomic molecules are further classified as monoatomic, diatomic, Polyatomic (Triatomic, Tetraatomic and so on).
Eg.
| Monoatomic | He, Zn etc. |
| Diatomic | O2, Cl2, N2 etc. |
| Triatomic | O3 |
| Tetraatomic | P4 |
| Octaatomic | S8 |
Heteroatomic Molecule:
This type of molecule contains different types of atoms molecules of compounds are heteroatomic molecules ex:-
CO2,PH3 (Phosphine Gas),CO3 etc.
