Chapter 24, Problem 4STP

Interpretation Introduction

Interpretation:

The characteristic of alpha particles is to be explained.

Concept introduction:

Alpha particles consisting of two protons and two electrons bound together to form a particle identical to the He nuclei.

Answer to Problem 4STP

Correct answer:

Option C. They are more penetrating than alpha particles.

Explanation of Solution

Reason for correct option:

Beta particles have more penetrating power than alpha particles because beta particles are much smaller in size than the alpha particles and so they have less ionizing power but their smaller size gives them higher penetrating power.

Conclusion

Reasons for incorrect options:

A. yes alpha particles carry charge of ${\text{2}}^{\text{+}}$.

B. yes they are represented by the symbol of ${}_{\text{2}}^{\text{4}}\text{He}$.

D. yes they have the same composition as helium nuclei.