Chapter 7, Problem 56GQ

Interpretation Introduction

Interpretation:

Decreasing order of size for the given ions ${\text{K}}^{\text{+,}}{\text{Cl}}^{\text{-}}{\text{, S}}^{\text{2-}}{\text{and Ca}}^{\text{2+}}$ has to be ranked.

Concept Introduction:

Electronic configuration: The electronic configuration is the distribution of electrons of an given molecule or respective atoms in atomic or molecular orbital’s. The important there rules for electronic configuration given below.

Atomic radius: The concept explain chemical element is a measured of the size of its atoms, in other words to measure the distance from the center of the nucleus to the boundary of the surrounding cloud of number of electrons.

Ionization energy (IE): The ionization energy is the required to remove an electron from an atom in the gas phase.

General formula of ionization energy= $\begin{array}{l}\text{Atom in the ground state(g)}\to {\text{Atom}}^{\text{+}}(g)+e^{-}\\ \text{ΔU=}\text{Ionization}\text{energy}\text{(IE)}\end{array}$

Increase and decrease electro negativity: The less vacancy electrons an atoms has the least it will gain of electrons. Moreover the electron affinity decrease down the groups and from right to left across the periods on the periodic table, the reason is electrons are placed in a higher energy level far from the nucleus thus a decrease from its pull.