Question detail
What happens to the mass number and atomic number of an atom when it undergoes alpha decay?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Atoms and nuclear radiation
Question
What happens to the mass number and atomic number of an atom when it undergoes alpha decay?
Answer
During alpha decay, the mass number of the atom decreases by 4 and the atomic number decreases by 2.
Explanation
This answer is strong because it directly addresses the changes in mass and atomic numbers that occur during alpha decay, demonstrating an understanding of nuclear reactions. The question tests the student's ability to recall specific changes associated with alpha decay.
Common mistake
Common Mistake in Alpha Decay Explanation
Students often state that alpha decay decreases the mass number by 2 and the atomic number by 4.
Remember that alpha decay decreases the mass number by 4 and the atomic number by 2. Use the correct values when explaining the changes in the nucleus.
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