Atomic Structure Question 117
Question: The electronic configuration of a dipositive metal $ {M^{2+}} $ is 2, 8, 14 and its atomic weight is 56 a.m.u. The number of neutrons in its nuclei would be [MNR 1984, 89; Kerala PMT 1999]
Options:
A) 30
B) 32
C) 34
D) 42
Show Answer
Answer:
Correct Answer: A
Solution:
Metal is $ _{56}{M^{2+}},(2,,8,,14) $ than $ n=A-Z $
$ =56-26=30 $ .
