Chapter 2, Problem 2.39UKC

(a)

Interpretation Introduction

Interpretation:

The element which has electronic configuration ${\text{1s}}^{\text{2}}{\text{2s}}^{\text{2}}{\text{2p}}^{\text{6}}{\text{3s}}^{\text{2}}{\text{3p}}^{\text{1}}$ has to be given.

(b)

Interpretation Introduction

Interpretation:

The valence electrons of aluminium have to be given.

Concept Introduction:

Valence electrons:

Valence electrons are electrons that exist in the outermost shell surrounding an atomic nucleus.

(c)

Interpretation Introduction

Interpretation:

The group and the periodic number of Aluminium have to be given.