Chapter 2, Problem 2.89QP

(a)

Interpretation Introduction

Interpretation:

The given electron configuration $1s^{2}1p^2$ is possible or not possible has to be mentioned.

Concept Introduction:

Aufbau principle says that electron fills the lowest energy level before filling the higher ones.

Figure 1

(b)

Interpretation Introduction

Interpretation:

The given electron configuration $1s^{2}2s^{2}2p^2$ is possible or not possible has to be mentioned.

Concept Introduction:

Refer to part (a).

(c)

Interpretation Introduction

Interpretation:

The given electron configuration $2s^{2}2s^{2}2p^{6}2d^1$ is possible or not possible has to be mentioned.

Concept Introduction:

Refer to part (a).

(d)

Interpretation Introduction

Interpretation:

The given electron configuration $1s^{2}2s^3$ is possible or not possible has to be mentioned.

Concept Introduction:

Refer to part (a).