Chapter 2, Problem 2.81QP

(a)

Interpretation Introduction

Interpretation:

The maximum number of electrons present in the $\left(\text{n= 1}\right)$ energy levels has to be identified.

Concept Introduction:

Principal energy level is corresponding to the principal quantum number.  It is related to the average distance from the nucleus.  The first principal energy level $\left(\text{n= 1}\right)$

The second principal energy level $\left(\text{n= 2}\right),$ the third principal energy level $\left(\text{n= 3}\right).$   It has regions where electrons may be found, and have integral values designated $\text{n=1,}\text{n=2}\text{,n=3}$ and so on.

(b)

Interpretation Introduction

Interpretation:

The maximum number of electrons present in the $\left(\text{n= 2}\right)$ energy levels has to be identified.

Concept Introduction:

Refer part (a).

(c)

Interpretation Introduction

Interpretation:

The maximum number of electrons present in the $\left(\text{n= 3}\right)$ energy levels has to be identified.

Concept Introduction:

Refer part (a).