Chapter 9.5, Problem 1RC

Interpretation Introduction

Interpretation:

The electrostatic potential map corresponding to that of $HCl$ and $LiH$ have to be identified from the given diagrams.

Concept Introduction:

Bond polarity refers to the polarity in the bond due to the unsymmetrical electron distribution between two atoms which are covalently bonded.  The unsymmetrical electron or charge distribution arises due to large difference in electronegativity between the atoms.

Polar covalent bond refers to the covalent bond which has polarity caused by unsymmetrical distribution of bonding electrons between the two atoms.  When atoms of moderately different electronegativity bonded by mutual sharing of electrons, the atom having more electronegativity tend to pull the electron cloud towards it.  This leads to unsymmetrical distribution of electrons between the bonded atoms that one end of the molecule develops slight positive charge and another end of the molecule develops slight negative charge.  This is called polarity and such bond is called polar covalent bond.