Question detail
In a nuclear equation representing gamma emission, how do the mass number and atomic number change?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Atoms and nuclear radiation
Question
- A. Mass number decreases by 4, atomic number decreases by 2
- B. Mass number remains unchanged, atomic number remains unchanged
- C. Mass number increases by 1, atomic number remains unchanged
- D. Mass number decreases by 1, atomic number increases by 1
Answer
The correct answer is B: Mass number remains unchanged, atomic number remains unchanged.
Explanation
The correct answer is B: Mass number remains unchanged, atomic number remains unchanged. This supports the learning objective "Represent gamma emission using a nuclear equation or written description." in Nuclear equations because it uses the correct atomic and nuclear radiation relationship for Atoms and nuclear radiation. The other options are less suitable because they do not match the required Nuclear equations idea: Mass number decreases by 4, atomic number decreases by 2; Mass number increases by 1, atomic number remains unchanged; Mass number decreases by 1, atomic number increases by 1.
Common mistake
Misunderstanding Gamma Emission
Students often confuse gamma emission with other types of radiation, thinking it changes the mass number or atomic number of the nucleus.
Remember that gamma emission does not change the mass number or atomic number; it is purely electromagnetic radiation emitted from the nucleus.
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