Co-Ordination Compounds Question 149
Question: How many unpaired electrons are present in the central metal ion of $ {{[CoCl_4]}^{2-}} $
[Orissa JEE 2005]
Options:
A) 3
B) 4
C) 5
D) 2
Show Answer
Answer:
Correct Answer: A
Solution:
$ _{27}Co\to [Ar]3d^{7}4s^{2} $
$ C{o^{2+}}\to 3d^{7}4s^{0} $ Number of unpaired electrons = 3.
