I meant to ask : how does bonding take place?

Bondings occurs as it is motivated by noble gas configuration.

It is of different types as:

Ionic bond: It occurs when the difference in the electronegativities of bonding atoms is large. In this type of bonding, more electronegative atom donates a pair of electron to the less electronegative atom.

Example: NaCl

Covalent bonding: It occurs when the difference in the electronegativities of bonding atoms is very small. This type of bonding takes place by sharing of electrons.

Example: Cl₂