Solve this:
Q). Ionic bond formation involves
(1) Elimination of protons
(2) Sharing of electrons
(3) Overlapping of orbitals 
(4) Formation of octets

The solution is as follows:

1. The correct option is (4) Formation of octets.

2. When ionic bonds are formed, electrons are exchanged between atoms such that one complete it's octet by losing and other by gaining electrons.

2. This lead to formation of positive and negative ion and ionic bond is formed.