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 neutrons only.
- D. The number of electrons.
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 why isotopes of the same element have the same chemical properties." 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 neutrons only.; The number of electrons..
Common mistake
Misconception about chemical properties of isotopes
Students often think that isotopes of the same element have different chemical properties because they contain different numbers of neutrons.
Explain that chemical properties are determined by the arrangement of electrons, which is the same for all isotopes of an element. Neutrons only affect the mass and nuclear stability, not the electron configuration or chemical behaviour.
Related flashcards
Flashcard 1 of 5
Related practice questions
Question 1 of 5
Choose an answer, get feedback, then move sideways through the set.