Question Detail

PHY 104 Atomic Structures Objective Question
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Question

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

Option B is the correct answer.

Detailed Explanation

The text states: 'The parent nucleus loses two protons and two neutrons. The atomic number Z of the daughter Y nucleus therefore decreases by two while the mass number A decreases by 4.'

Hint

An alpha particle consists of 2 protons and 2 neutrons.

Question Info

Course: PHY 104
Topic: Atomic Structures
Type: Objective
Difficulty: Not specified
Question 157 of 947
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