World of Chemistry, 3rd edition
World of Chemistry, 3rd edition
3rd Edition
ISBN: 9781133109655
Author: Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste
Publisher: Brooks / Cole / Cengage Learning
Question
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Chapter 19, Problem 48A
Interpretation Introduction

Interpretation: Relative abilities to penetrate have to be described for α,βandγ radiations.

Concept introduction: Nuclear reactions are those where an unstable nuclide disintegrates in order to form a stable nuclide with emission of various radiations feasibly. It is called radioactivity of nucleus. The particles or rays emitted during the process are alpha, beta and gamma rays which cause a change in the identity of nucleus.

Beta particle is one that has unit negative charge and alpha particle is one that has 2 unit positive charges and is equivalent to helium atom 24He .

Expert Solution & Answer
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Answer to Problem 48A

Most penetrating is γ ray and least is α . β ray penetrates up to 1 cm into the human body.

Explanation of Solution

When radioactive substance disintegrates, three types of radiations are produced : α , β and γ radiations. All three affect on the basis of their ability to penetrate into human body. Most penetrating is γ ray and least is α . α rays can be obstructed by paper or metal foil simply because their speed is less due to its heavy mass of 4 units, equivalent to that of 24He . β ray can penetrates up to 1 cm into the human body.

Conclusion

Most penetrating is γ ray and least is α . β ray penetrates up to 1 cm into the human body.

Chapter 19 Solutions

World of Chemistry, 3rd edition

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