Chapter 6, Problem 95A

Interpretation Introduction

Interpretation:

The element that has ground state electronic configuration of $\left[\text{Ar}\right]{\text{4s}}^{\text{2}}{\text{3d}}^{\text{6}}$ needs to be determined.

Concept introduction:

Electronic configurations of the atoms of the elements in the ground state are determined with the help of Aufbau principle, Hund’s rule and Pauli’s Exclusion principle.

Answer to Problem 95A

The electronic configuration of iron is $\left[\text{Ar}\right]{\text{4s}}^{\text{2}}{\text{3d}}^{\text{6}}$.

Explanation of Solution

Given electronic configuration of the element is $\left[\text{Ar}\right]{\text{4s}}^{\text{2}}{\text{3d}}^{\text{6}}$. The electronic configuration has outermost electrons in 3d orbital. The electronic configuration is found in the period immediately following argon. The electronic configuration of iron is $\left[\text{Ar}\right]{\text{4s}}^{\text{2}}{\text{3d}}^{\text{6}}$. Iron is found in group (VIII) and period 3.

Conclusion

Thus, the electronic configuration of iron is $\left[\text{Ar}\right]{\text{4s}}^{\text{2}}{\text{3d}}^{\text{6}}$.