Chapter 7, Problem 30PS

### Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

Chapter
Section

### Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

# Select the atom or ion in each pair that has the larger radius. (a) Cs or Rb (b) O2− or O (c) Br or As

(a)

Interpretation Introduction

Interpretation:

The atom has larger atomic radius has to be selected.

Concept Introduction:

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.

Increase and decrease electronegativity: 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.

Electronegativity: It is measure of the tendency of an atom to attract a bonding pair of electrons. For example the (F) fluorine is more electronegative element is assigned a value f (4.0) and values range down to cesium (CS) and francium (Fr) which are the largest electronegative at (0.7) range, generally the Pauling scale is used to analyze the electronegative range (or) properties.

Explanation

The periodic table was clearly explained the all (s,p, d, f) block elements atomic size will increase when left side to right side. Than all atomic size will be increase when above to below.

The Cesium (Cs) atomic radius greater than the Rubidium (Rb) atom because more number of electrons in (Cs) orbital shells of. Further the atomic number of Cs=55 and Rubidium atomic number (Z=37). Hence the (Figure 1) were clearly explaining the (Cs) atom having larger atomic radius than (Rb) atom...

(b)

Interpretation Introduction

Interpretation:

The ion that has larger atomic radius has to be selected.

Concept Introduction:

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.

Increase and decrease electronegativity: 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.

Electronegativity: It is measure of the tendency of an atom to attract a bonding pair of electrons. For example the (F) fluorine is more electronegative element is assigned a value f (4.0) and values range down to cesium (CS) and francium (Fr) which are the largest electronegative at (0.7) range, generally the Pauling scale is used to analyze the electronegative range (or) properties.

(c)

Interpretation Introduction

Interpretation:

The atom has larger atomic radius has to be selected.

Concept Introduction:

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.

Increase and decrease electronegativity: 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.

Electronegativity: It is measure of the tendency of an atom to attract a bonding pair of electrons. For example the (F) fluorine is more electronegative element is assigned a value f (4.0) and values range down to cesium (CS) and francium (Fr) which are the largest electronegative at (0.7) range, generally the Pauling scale is used to analyze the electronegative range (or) properties.

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