Chapter 1, Problem 1.16P

Interpretation Introduction

Interpretation:

The formal charge on every atom in the methanoate anion shown is to be determined.

Concept introduction:

The formal charge on an atom in a molecule or a polyatomic ion is determined from the group number of the atom and its actual valence electrons. The valence electrons are assigned on the basis of electrons shared in a covalent bond and the lone pairs. If an atom bears one or more lone pairs, then both the electrons in each lone pair are assigned to the atom which bears them. In a covalent bond, half of the electrons are assigned to each atom forming the covalent bond.