Chapter 24, Problem 5STP

Interpretation Introduction

Interpretation:

The reason for $\text{calcium-35}$ to undergoes positron emission is to be explained.

Concept introduction:

Positron emission is a process in which a proton inside a radioactive nucleus is converted into a neutron while releasing a positron and an electron neutrino.

Answer to Problem 5STP

Correct answer:

Option B. It lies below the line of stability

Explanation of Solution

Reason for correct option:

Positron emission is a process in which inside a radioactive nucleus, a proton is converted into a neutron while releasing a positron and an electron neutrino. So, the element which is less stable undergoes to positron emission.

According to graph, $\text{calcium-35}$ is lies below the stability line then it undergoes positron emission.

Conclusion

Reasons for incorrect options:

A. No, it lies below the stability line.

C. No, it has low neutron to proton ratio.

D. No, it does not have abundance of neutrons.