Synopsis

Atoms of elements which have the atoms are electrical neutral. All atoms have a tendency to attain the 8 electrons in their valency orbit as in noble gases.
For this, they form bonds with another atom.
There are two kinds of bonds -
i) Ionic bond
ii) Covalent bond
Ionic bond is formed between atoms of two dissimilar elements due to transfer of electrons from the atom of one element to the other. The covalent bond is formed by the sharing of electrons between atoms.
Electronic theory of valency, valence — shell — electron — pair repulsion- theory (VSEPRT) are two theories which explains the formation on these bounds.
These theories are also explain the bond angles and bond nature of between atoms.