Chapter 21, Problem 71AE

Interpretation Introduction

Interpretation: The symbol corresponding to each isotope in the given table is to be determined; also the isotope which is unstable, one which has magic number of protons and neutrons and one which yield potassium-39 after proton emission is to be determined.

Concept Introduction: The symbol of the given isotope is determined by the atomic number and mass number of the isotope.

The unstable isotope is the isotope which has least half life.
The magic numbers are $2,8,20,28,50$ .

The isotope which releases potassium-39 on positron emission must have mas number greater than 39.

(a)

To determine: The symbols of the each of the given isotopes.

Step 1:

Interpretation Introduction

To determine: The symbol of the given isotope.

Step 2:

Interpretation Introduction

To determine: The symbol of the given isotope.

Step 3:

Interpretation Introduction

To determine: The symbol of the given isotope.

Step 4:

Interpretation Introduction

To determine: The symbol of the given isotope.

(b)

Interpretation Introduction

To determine: The isotope which is most likely to be unstable out of the given isotopes.

(c)

Interpretation Introduction

To determine: The isotopes which contain magic number of neutrons and protons out of the given isotopes.

(d)

Interpretation Introduction

To determine: The isotope which yields potassium-39 after proton emission.