Question

21.
18. Which of the following pairs are isobars?
Mark only one oval.
A] CI- (A=35 ]and Cl- [A=37]
B] Ar- [A=40] and Ca-[A= 40]
C] C-[A=12] & C-[A=14]
D] None of these​

Answer 1

Answer:

b) argan and calcium

Explanation:

mass number are same