Alpha, beta and gamma emissions have different penetrating power due to their characteristics. Concept Introduction : Gamma rays have a higher penetrating power than beta particles. Beta particles have a higher penetrating power than alpha particles. Correct answer: a. barium-140, bismuth-210, radium-223 Reason for correct answer: Gamma rays have a higher penetrating power than beca particles. Beta particles have a higher penetrating power than alpha particles. Since barium-140 is gamma emitter then this has the highest penetrating power. Bismuth-210 is beta emitter so this has a lower penetrating power than barium-140 but higher than Radium-223. Radium-223 has the lowest penetrating power since this is an alpha emitter. Reason for incorrect answer: Option bis incorrect because it considers that barium-140 has the least penetrating power. Option c is incorrect because it considers that radium-223 has the most penetrating power. Option d is incorrect because it considers that bismuth-210 has the least penetrating power. Conclusion: Thus, option (a) is correct option.

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Chapter 11, Problem 47P

Interpretation Introduction

Interpretation:Alpha, beta and gamma emissions have different penetrating power due to their characteristics.

Concept Introduction:

Gamma rays have a higher penetrating power than beta particles.
Beta particles have a higher penetrating power than alpha particles.

Correct answer:

a. barium-140, bismuth-210, radium-223

Reason for correct answer:

Gamma rays have a higher penetrating power than beca particles.
Beta particles have a higher penetrating power than alpha particles.
Since barium-140 is gamma emitter then this has the highest penetrating power.
Bismuth-210 is beta emitter so this has a lower penetrating power than barium-140 but higher than Radium-223.
Radium-223 has the lowest penetrating power since this is an alpha emitter.

Reason for incorrect answer:

Option bis incorrect because it considers that barium-140 has the least penetrating power.
Option c is incorrect because it considers that radium-223 has the most penetrating power.
Option d is incorrect because it considers that bismuth-210 has the least penetrating power.

Conclusion: Thus, option (a) is correct option.

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