Which of the following is an example of a pair of Isobars?
A.Hydrogen and helium
B.Oxygen and carbon
C.Calcium and argon✓ Correct
D.Chlorine and oxygen
Explanation
Isobars are atoms of different elements with the same mass number. Calcium-40 and Argon-40 are a classic example of isobars, both having mass number 40.
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