The correct ground-state electron configurations of Al, B, and F are to be determined and the reason behind the given incorrect electronic configurations is to be explained. Concept introduction: An atom has a positivelycharged nucleus, which is surrounded by negativelycharged electrons. The electrons revolve around the nucleus in their orbitals (or shells). Each orbital has subshells. The arrangement of electrons in the orbitals of an atom is called electron configuration. It is written with the help of quantum numbers. Every electron occupies orbitals in the increasing order of their energies. Pauli Exclusion Principle states that no two electrons in the same atom can have the same quantum numbers. Hund’s Rule states that when electrons occupy degenerate orbitals (i.e., orbitals having the same energies), they should occupy all the empty orbitals of the subshell before occupying the orbital with one electron.

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Chapter 6, Problem 82QP

Interpretation Introduction

Interpretation:

The correct ground-state electron configurations of Al, B, and F are to be determined and the reason behind the given incorrect electronic configurations is to be explained.

Concept introduction:

An atom has a positivelycharged nucleus, which is surrounded by negativelycharged electrons. The electrons revolve around the nucleus in their orbitals (or shells). Each orbital has subshells.

The arrangement of electrons in the orbitals of an atom is called electron configuration. It is written with the help of quantum numbers.

Every electron occupies orbitals in the increasing order of their energies.

Pauli Exclusion Principle states that no two electrons in the same atom can have the same quantum numbers.

Hund’s Rule states that when electrons occupy degenerate orbitals (i.e., orbitals having the same energies), they should occupy all the empty orbitals of the subshell before occupying the orbital with one electron.

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