Chapter 8, Problem 8F.1AST

(a)

Interpretation Introduction

Interpretation:

The oxidation number of carbon in carbon monoxide has to be written.

(b)

Interpretation Introduction

Interpretation:

The formal charge of carbon in carbon monoxide has to be given.

Concept Introduction:

Formal charge (F.C):  The charges that assigned to each atom in a molecule or ion by a set of arbitrary rules and don not actually represent the actual charges on the atoms are called as formal charges.

The formal charge is calculated using the formula,

  $\text{F}\text{.C=Valence}\text{electrons-No}\text{of}\text{non-bonding}\text{electrons-}\frac{\text{No}\text{of}\text{bonding}\text{electrons}}{\text{2}}$

The Lewis structure with zero formal charge or least separated formal charges is the preferred structure of the molecule.