Chapter 7, Problem 59A

(a)

Interpretation Introduction

Interpretation: To determine the electronic configuration of iron after losing two electrons.

Concept Introduction: The placement of electrons inside orbitals around a nuclear nucleus is known as electronic configuration, also known as electronic structure, as well as electron configuration.

Answer to Problem 59A

The electronic configuration of the ${\text{Fe}}^{\text{2+}}$ ion will be ${\text{1s}}^{\text{2}}{\text{2s}}^{\text{2}}{\text{2p}}^{\text{6}}{\text{3s}}^{\text{2}}{\text{3p}}^{\text{6}}{\text{3d}}^{\text{6}}$ .

Explanation of Solution

• The atomic number of Fe(iron) atom =26.
• After losing two electrons, the number of electrons in an iron atom = $26-2=24$
• The electronic configuration of ${\text{Fe}}^{\text{2+}}$ = ${\text{1s}}^{\text{2}}{\text{2s}}^{\text{2}}{\text{2p}}^{\text{6}}{\text{3s}}^{\text{2}}{\text{3p}}^{\text{6}}{\text{3d}}^{\text{6}}$

(b)

Interpretation Introduction

Interpretation: To determine the electronic configuration of cobalt cation.

Concept Introduction: The placement of electrons inside orbitals around a nuclear nucleus is known as electronic configuration, also known as electronic structure as well as electron configuration.

Answer to Problem 59A

The electronic configuration of the ${\text{Co}}^{\text{2+}}$ ion will be ${\text{1s}}^{\text{2}}{\text{2s}}^{\text{2}}{\text{2p}}^{\text{6}}{\text{3s}}^{\text{2}}{\text{3p}}^{\text{6}}{\text{3d}}^7$ .

Explanation of Solution

• The atomic number of Co (cobalt atom =27.
• After losing two electrons, the number of electrons in a cobalt atom = $27-2=25$
• The electronic configuration of ${\text{Co}}^{\text{2+}}$ = ${\text{1s}}^{\text{2}}{\text{2s}}^{\text{2}}{\text{2p}}^{\text{6}}{\text{3s}}^{\text{2}}{\text{3p}}^{\text{6}}{\text{3d}}^7$ .

(c)

Interpretation Introduction

Interpretation: To determine the electronic configuration of Nickel cation.

Concept Introduction: The placement of electrons inside orbitals around a nuclear nucleus is known as electronic configuration, also known as electronic structure as well as electron configuration.

Answer to Problem 59A

The electronic configuration of the ${\text{Ni}}^{\text{2+}}$ ion will be ${\text{1s}}^{\text{2}}{\text{2s}}^{\text{2}}{\text{2p}}^{\text{6}}{\text{3s}}^{\text{2}}{\text{3p}}^{\text{6}}{\text{3d}}^8$ .

Explanation of Solution

• The atomic number of Ni (nickel) atom =28.
• After losing two electrons, the number of electrons in a nickel atom = $28-2=26$
• The electronic configuration of ${\text{Ni}}^{\text{2+}}$ = ${\text{1s}}^{\text{2}}{\text{2s}}^{\text{2}}{\text{2p}}^{\text{6}}{\text{3s}}^{\text{2}}{\text{3p}}^{\text{6}}{\text{3d}}^8$