Chapter 2, Problem 2.24CP

Where on the blank outline of the periodic table do elements that meet the following descriptions appear?

1. (a) Elements with the valence-shell ground-state electron configuration ns² np⁵
2. (b) An element whose fourth shell contains two p electrons
3. (c) An element with the ground-state electron configuration [Ar] 4s² 3d¹⁰ 4p⁵

Interpretation Introduction

Interpretation:

Elements with the given valence shell electronic configuration has to be identified.

Explanation of Solution

Given valence shell electronic configuration,

$\text{n}{\text{s}}^{\text{2}}\text{n}{\text{p}}^{\text{5}}$

Periodic table is given in figure 1.

Figure 1

The elements with the given valence shell electronic configuration are highlighted (Red color) in the below periodic table

Figure 2

Interpretation Introduction

Interpretation:

An element with fourth shell containing two $p$ electrons has to be identified.

Explanation of Solution

Given valence shell electronic configuration,

$\begin{array}{l}\text{An element with fourth shell contains two electrons}\\ \text{4}{\text{p}}^{\text{2}}\end{array}$

Periodic table is given in figure 1.

Figure 1

An element with fourth shell contains two $p$ electrons is highlighted (Red color) in the below periodic table

Figure 3

Interpretation Introduction

Interpretation:

An element with given ground-state electronic configuration has to be identified.

Explanation of Solution

Given ground-state electronic configuration,

$\left[\text{Ar}\right]\text{4}{\text{s}}^{\text{2}}\text{3}{\text{d}}^{\text{10}}\text{4}{\text{p}}^{\text{5}}$

Calculate the total number of electrons

$\begin{array}{l}\text{18}\text{electrons}\left(\text{from}\text{Ar}\right)\text{+}\text{17}\text{electrons}\text{=}\text{35}\text{electrons}\text{.}\\ \\ \text{therefore,}\text{given}\text{atom}\text{is}\text{Bromine}\end{array}$

Periodic table is given in figure 1.

Figure 1

An element with fourth shell contains two $p$ electrons is highlighted (Red color) in the below periodic table

Figure 4