(a) Interpretation: The reason for the atomic radius of anion to be always larger than that of the atom from which it is derived is to be explained. Concept Introduction: Atomic radius is half the distance between two molecules of an atom. Cation is formed by removal of electron/s from an atom and anions are formed by addition of electron/s in an atom. For same atoms, cationic radius is always less than that of the neutral atom and anionic radius is always greater than that of the neutral atom.

Question

( a ) Eva l u a te t h e expre s s i o n s 2 * 1, 2 * 11 + 32,2 * 11 + 3 + 52, and 2 * 11 + 3 + 5 + 72. (b) How do the atomic numbers of the noble gases relate to the numbersfrom part (a)? (c) What topic discussed in Chapter 6 is thesource of the number “2” in the expressions in part (a)?

Answer 1

Question

Chapter 2, Problem 58P

Interpretation Introduction

(a)

Interpretation:

The reason for the atomic radius of anion to be always larger than that of the atom from which it is derived is to be explained.

Concept Introduction:

Atomic radius is half the distance between two molecules of an atom. Cation is formed by removal of electron/s from an atom and anions are formed by addition of electron/s in an atom. For same atoms, cationic radius is always less than that of the neutral atom and anionic radius is always greater than that of the neutral atom.

Interpretation Introduction

(b)

Interpretation:

The reason for the atomic radius of cation to be always smaller than that of the atom from which it is derived is to be explained.

Concept Introduction:

Atomic radius is half the distance between two molecules of an atom. Cation is formed by removal of electron/s from an atom and anions are formed by addition of electron/s in an atom. For same atoms, cationic radius is always less than that of the neutral atom and anionic radius is always greater than that of the neutral atom.

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