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 $ .



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