Concept explainers
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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