Chemistryhard · Past Paper
Which of these pairs are isobars?
AC-12 and C-14
BH-1 and H-2
CAr-40 and Ca-40
DO-16 and O-18
✓ Correct Answer: C — Ar-40 and Ca-40
Isobars are atoms of different elements having the same mass number (40 in this case).
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