A) \[_{19}^{40}K,\,_{20}^{40}Ca\]
B) \[_{19}^{39}K,\,_{20}^{40}Ca\]
C) \[_{18}^{33}Ar,\,_{\,18}^{40}Ar\]
D) \[_{18}^{40}Ar,\,_{\,20}^{40}Ca\]
Correct Answer: B
Solution :
In isotones have same number of neutrons.You need to login to perform this action.
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