Consider a nucleus that undergoes α decay. (a) Is the radius of the resulting daughter nucleus greater than, less than, or equal to the radius of the original nucleus? (b) Choose the best explanation from among the following: I. The decay adds an alpha particle to the nucleus, causing its radius to increase. II. When the nucleus undergoes α decay

Chapter 32, Section 32.1 #12

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Consider a nucleus that undergoes α decay.
(a) Is the radius of the resulting daughter nucleus greater than, less than, or equal to the radius of the original nucleus?
(b) Choose the best explanation from among the following:
I. The decay adds an alpha particle to the nucleus, causing its radius to increase.
II. When the nucleus undergoes α decay it ejects two neutrons and two protons. This decreases the number of nucleons in the nucleus, and therefore its radius will decrease.
III. An α decay leaves the number of nucleons unchanged. As a result, the radius of the nucleus stays the same.
Related Book For answer-question

Physics

5th edition

Authors: James S. Walker

ISBN: 978-0321976444