Question detail
What is the mass number of an isotope?
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 isotopes
Question
- A. The number of protons only.
- B. The total number of protons and neutrons.
- C. The number of electrons only.
- D. The number of neutrons only.
Answer
The correct answer is B: The total number of protons and neutrons..
Explanation
The correct answer is B: The total number of protons and neutrons.. This supports the learning objective "Explain that isotopes of an element have the same number of protons." in Mass number, atomic number and isotopes because it uses the correct atomic and nuclear radiation relationship for Atoms and isotopes. The other options are less suitable because they do not match the required Mass number, atomic number and isotopes idea: The number of protons only.; The number of electrons only.; The number of neutrons only..
Common mistake
Misunderstanding Isotope Properties
Students often think that isotopes of an element have different numbers of protons.
Remember that isotopes are defined as atoms of the same element that have the same number of protons but different numbers of neutrons.
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