Question

What is the explanation as to why bonds form

Answer 1

Atoms make bonds to be stable. normally the electronic configuration of valence shell of inert gases are supposed to be stable so to gain that configurations other atoms make bonds by sharing or transferring the electrons.

Answer 2

They want a full outer shell of electrons, so the lose, gain, or share electrons with other elements, forming compounds, until they have 8 valence electrons and become stable.