Passage : The tendency of an atom of an element to attract the shared pair of electrons in a covalent bond towards its own direction is called Electro negativity.

Electro negativity is the property of bonded atom and it has o units

Expressions of Electro negativity:

The following approaches were used to express the electro negativity.

1) Pauling’s Approach    2) Milliken’s Approach   3) Allred-Rochow scale

Q. The electro negativity of oxygen on Pauling’s scale is 3.5, on Milliken’s scale is