D-And F-Block Elements Ques 398
Question: Which of the following ions has the highest magnetic moment
[JIPMER 1997; AIEEE 2002]
Options:
A) $ T{{i}^{3+}} $
B) $ S{{c}^{3+}} $
C) $ M{{n}^{2+}} $
D) $ Z{{n}^{2+}} $
Show Answer
Answer:
Correct Answer: C
Solution:
$ T{{i}^{3+}},\to 3d^{1}4s^{0} $ ; $ S{{c}^{3+}},\to 3d^{0} $
$ M{{n}^{2+}},\to 3d^{5}4s^{0} $ ; $ Z{{n}^{2+}},\to 3d^{10}4s^{0} $ In $ M{{n}^{2+}} $ number of unpaired d $ {{e}^{-}}=5 $ .
So it has maximum magnetic moment according to the formula.
$ \mu =\sqrt{n(n+2)} $
