Chapter 5, Problem 72A

Interpretation Introduction

Interpretation:

The number of electrons can be contained in all the orbitals related to an Argon atom’s third energy level needs to be determined.

Concept introduction:

Argon is the third noble gas. It is non-reactive.

Answer to Problem 72A

The Third energy level of Argon can have $8$ electrons.

Explanation of Solution

Argon is the third noble gas. It is non-reactive. Argon has $18$ electrons. Its electron configuration is $1s^2,2s^2,2p^6,3s^2,3p^6.$

The electrons in $3s$ and $3p$ are $2$ and $6$ respectively. Therefore, the third energy level can have total $8$ electrons.

Conclusion

The Third energy level of Argon can have $8$ electrons.