Question detail
When interpreting a nuclear equation, what does the notation A/Z X 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. X is the element, A is the atomic number, Z is the mass number
- B. X is the element, A is the mass number, Z is the atomic number
- C. X is the mass number, A is the atomic number, Z is the element
- D. X is the charge, A is the atomic number, Z is the mass number
Answer
The correct answer is B: X is the element, A is the mass number, Z is the atomic number.
Explanation
The correct answer is B: X is the element, A is the mass number, Z is the atomic number. This supports the learning objective "Use isotope notation correctly when writing or interpreting 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: X is the element, A is the atomic number, Z is the mass number; X is the mass number, A is the atomic number, Z is the element; X is the charge, A is the atomic number, Z is the mass number.
Common mistake
Common Mistake in Isotope Notation
Students often confuse the mass number and atomic number when writing isotope notation, leading to incorrect representations of isotopes.
To fix this, remember that the mass number is the total number of protons and neutrons, while the atomic number is just the number of protons. Always place the mass number at the top left and the atomic number at the bottom left of the element symbol.
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