Chemistry Principles And Practice
Chemistry Principles And Practice
3rd Edition
ISBN: 9781305295803
Author: David Reger; Scott Ball; Daniel Goode
Publisher: Cengage Learning
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Chapter 7, Problem 7.77QE

(a)

Interpretation Introduction

Interpretation:

The highest occupied subshell in helium atom has to be determined.

Concept Introduction:

The electronic configuration is defined as the distribution of electrons in various atomic orbitals of the atom. The electrons that are present in an outermost orbital are known as valence electrons whereas those present in the orbitals with lower quantum numbers are called core electrons. The general outer electronic configuration of s block elements is ns12, that of p block elements is ns2np16, that of d block elements is (n1)d110ns02 and that of f block elements is (n2)f114(n1)d010ns2.

Electrons are filled in orbitals in accordance with three rules: Aufbau principle, Hund’s rule, and Pauli’s exclusion principle. Aufbau principle states that electrons are filled in the orbitals from lower to higher energy level as follows:

  1s<2s<2p<3s<3p<4s<3d<4p<5s<4d<5p<6s<4f<5d<6p<7s

Hund’s rule states that initially each orbital is singly occupied and then pairing occurs and Pauli’s exclusion principle states that the spin of two electrons in one orbital is always different.

(b)

Interpretation Introduction

Interpretation:

The highest occupied subshell in an arsenic atom has to be determined.

Concept Introduction:

Refer to part (a).

(c)

Interpretation Introduction

Interpretation:

The highest occupied subshell in carbon atom has to be determined.

Concept Introduction:

Refer to part (a).

(d)

Interpretation Introduction

Interpretation:

The highest occupied subshell in promethium atom has to be determined.

Concept Introduction:

Refer to part (a).

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Chapter 7 Solutions

Chemistry Principles And Practice

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