Chapter 11, Problem 4PE

Interpretation Introduction

(a)

Interpretation:

The electron configuration for the highest occupied energy level for Group $\text{3A}/\text{13}$ elements is to be stated.

Concept introduction:

Electronic configuration represents the arrangement of electrons in an atom. The sublevels are filled according to their increasing energy. The electrons are firstly filled into the sublevel having lowest energy. The sublevel closest to the nucleus has the lowest energy. The trend of filling of electrons according to the energy of sublevels is given below.

$1s<2s<2p<3s<3p<4s<3d<4p<5s<4d<5p<6s$

Interpretation Introduction

(b)

Interpretation:

The group which represents the electron configuration for the highest occupied energy level as $n{s}^{2}n{p}^3$ is to be stated.

Concept introduction:

Electronic configuration represents the arrangement of electrons in an atom. The sublevels are filled according to their increasing energy. The electrons are firstly filled into the sublevel having lowest energy. The sublevel closest to the nucleus has the lowest energy. The trend of filling of electrons according to the energy of sublevels is given below.

$1s<2s<2p<3s<3p<4s<3d<4p<5s<4d<5p<6s$