Question Detail

CHM 102 Radioactivity Objective Question
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Question

During alpha (α) decay, how do the atomic mass number and atomic number of the parent nucleus change?
Options
A Both the mass number and atomic number increase by 1.
B The mass number decreases by 4, and the atomic number decreases by 2.
Correct Answer
C The mass number remains unchanged, and the atomic number increases by 1.
D The mass number decreases by 2, and the atomic number decreases by 1.
Correct Answer

Option B is the correct answer.

Detailed Explanation

Page 12 states: 'In α decay, the atomic mass and atomic number of the parent nucleus are reduced by 4 and 2 respectively in the daughter nucleus.'

Hint

Consult the last bullet point on page 12 regarding the effect of alpha decay on nuclear numbers.

Question Info

Course: CHM 102
Topic: Radioactivity
Type: Objective
Difficulty: Not specified
Question 1849 of 1999
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