Chapter 9.5, Problem 1PE

(a)

Interpretation Introduction

Interpretation:

The bonds in $CsCl$ are whether covalent or polar covalent or ionic has to be determined.

Concept Introduction:

Ionic bond is the electrostatic force of attraction that binds ions of opposite charges into a stable molecule.

Covalent bond refers to the bond formed between two atoms by mutual sharing of electrons – that each atom shares equal number of electrons between them and the charge distribution (electron) between the two atoms held by covalent bond is symmetrical.  The difference in electronegativity between these two atoms is very less or the two atoms have same electronegativity.

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.

(b)

Interpretation Introduction

Interpretation:

The bond in $H_{2}S$ are whether covalent or polar covalent or ionic has to be determined.

Concept Introduction:

Ionic bond is the electrostatic force of attraction that binds ions of opposite charges into a stable molecule.

Covalent bond refers to the bond formed between two atoms by mutual sharing of electrons – that each atom shares equal number of electrons between them and the charge distribution (electron) between the two atoms held by covalent bond is symmetrical.  The difference in electronegativity between these two atoms is very less or the two atoms have same electronegativity.

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.

(c)

Interpretation Introduction

Interpretation:

The $N-N$ bond in $H_{2}NN{H}_2$ are whether covalent or polar covalent or ionic has to be determined.

Concept Introduction:

Ionic bond is the electrostatic force of attraction that binds ions of opposite charges into a stable molecule.

Covalent bond refers to the bond formed between two atoms by mutual sharing of electrons – that each atom shares equal number of electrons between them and the charge distribution (electron) between the two atoms held by covalent bond is symmetrical.  The difference in electronegativity between these two atoms is very less or the two atoms have same electronegativity.

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.