Chapter 3, Problem 3IA.7Q

Summary Introduction

To determine:

A reason corresponding to some molecules having polar bonds and yet being non polar molecules and some other molecules, like water and ammonia, being polar and having polar bonds.

Introduction:

Polarity of a bond is directly related to the electronegativity difference. A polar bond corresponds to a non-uniform distribution of the electron cloud between two nonmetals. Thus, the bond formed between them is a covalent bond. This corresponds to the fact that an atom with higher electronegativity value will show a higher affinity for electrons.

A non-polar bond is formed by a mononuclear diatomic molecule that corresponds to a uniform distribution of the electron cloud. These molecules do not possess dipole moment.