Chapter 4, Problem 90CP

(a)

Interpretation Introduction

Interpretation:

The number of protons, neutrons and electrons in ${}_{26}^{58}\text{Fe}$ needs to be determined.

Concept Introduction :

The atomic number represents the number of electrons revolving round the nucleus in an atom. It also represents the number of protons in the nucleus of an atom.

The sum of the number of neutrons and protons in the nucleus of an atom represents mass number.

(b)

Interpretation Introduction

Interpretation:

The most abundant isotope in iron sample needs to be determined.

Concept Introduction :

From the given set of isotopes of an atom, the most abundant isotope will have maximum percentage abundance.

(c)

Interpretation Introduction

Interpretation:

The number of neutrons in ${}_{26}^{57}\text{Fe}$ needs to be determined.

Concept Introduction :

The atomic number represents the number of electrons revolving round the nucleus in an atom. It also represents the number of protons in the nucleus of an atom.

The sum of the number of neutrons and protons in the nucleus of an atom represents mass number.

(d)

Interpretation Introduction

Interpretation:

This is to be explained why any isotope of iron does not have atomic mass of 55.85 amu.

Concept Introduction :

Atomic mass of any element listed on periodic table is average atomic mass of all its isotopes and it is calculated by taking average of product of atomic mass and percent abundance of isotope of that element.