Law of octaves, in chemistry, the generalization made by the English chemist J.A.R. Newlands in 1865 that, if the chemical elements are arranged according to increasing atomic weight, those with similar physical and chemical properties occur after each interval of seven elements.
The tendency of an atom to get octet in its valence shell like inert gases and thereby acquiring stability is known as octet rule .
Atoms can combine either by transfer of valence electrons from one atom to another by sharing of valence electrons in order to have octet in their valence shells . This is known as octet rule .