A) 32
B) 42
C) 30
D) 34
Correct Answer: C
Solution :
Number of electrons in \[{{M}^{2+}}=24\] \[\therefore \] number of electrons in \[M=26\] ie, atomic number \[\text{(Z)}=26\] Mass number \[\text{(A)}=56\] \[\therefore \]number of neutrons \[=A-Z=56-26=30.\]You need to login to perform this action.
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