Question detail
In a nuclear equation, what does the mass number represent?
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. The total number of protons
- B. The total number of neutrons
- C. The total number of protons and neutrons
- D. The total number of electrons
Answer
The correct answer is C: The total number of protons and neutrons.
Explanation
The correct answer is C: The total number of protons and neutrons. This supports the learning objective "Balance atomic numbers in nuclear equations." 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: The total number of protons; The total number of neutrons; The total number of electrons.
Common mistake
Common Mistake in Balancing Atomic Numbers
Students often forget to adjust both the mass number and atomic number when balancing nuclear equations, leading to incorrect representations of decay processes.
Always ensure that both the mass number and atomic number are balanced on both sides of the equation. Check that the total atomic number of reactants equals that of the products.
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