Chapter 5, Problem 8STP

Interpretation Introduction

Interpretation:

The complete electronic configuration of the scandium atom needs to be determined.

Concept introduction:

Electronic configurations of the elements are the distribution of electrons in the atomic orbitals. $2n^2$ formula is used for the determination of maximum number of electrons present in an orbit where $n$ is the number of orbit.

Answer to Problem 8STP

The correct option is A.

Explanation of Solution

The atomic number of scandium is $21$. Therefore, the electrons present in scandium is $21$. Hence, the electronic configuration of scandium atom is as follows:

${\text{1s}}^2{\text{2s}}^2{\text{2p}}^6{\text{3s}}^2{\text{3p}}^6{\text{4s}}^{\text{2}}3{\text{d}}^1$

Hence, the correct option is A.

Conclusion

The electronic configuration of scandium atom is ${\text{1s}}^2{\text{2s}}^2{\text{2p}}^6{\text{3s}}^2{\text{3p}}^6{\text{4s}}^{\text{2}}3{\text{d}}^1$. Hence, the correct option is A.