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Chemistry In Focus

7th Edition
Tro + 1 other
ISBN: 9781337399692

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Chapter
Section
BuyFindarrow_forward

Chemistry In Focus

7th Edition
Tro + 1 other
ISBN: 9781337399692
Textbook Problem

A critical mass is required to achieve sustained fission because:

a. with smaller amounts, too many neutrons escape without initiating fission in other nuclei.

b. with smaller amounts, the fission reaction does not generate enough heat.

c. with smaller amounts, the fission products stop the reaction.

Interpretation Introduction

Interpretation:

The reason for the fact that critical mass is an important factor is to be determined.

Concept Introduction:

Critical mass is the minimum amount of fissile material needed for carrying out a sustained nuclear chain reaction. It depends upon nuclear properties such as cross-section, density, purity, temperature and surroundings.

Explanation

Reason for the correct option:

The critical mass is necessary for carrying out a certain nuclear reaction because it is the minimum amount of fissile material needed for carrying out a sustained nuclear chain reaction. If the amount of fissile material is less than the critical mass, many neutrons escape without initiating the fission reaction.

Hence, option (a) is correct...

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