MCQ
Which is a pair of isobars?
- ✓${ }_{20}^{40} Ca$ and ${ }_{20}^{40} Ar$
- B${ }_1^1 H$ and ${ }_1^3 H$
- C${ }_8^{16} O$ and ${ }_8^{17} O$
- D${ }_{11}^{23} Na$ and ${ }_{11}^{24} Na$
✓
Answer
Correct option: A.
${ }_{20}^{40} Ca$ and ${ }_{20}^{40} Ar$
A
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