Atomic Structure Question 335
Question: The number of unpaired electrons in a chromic ion $ C{r^{3+}} $ (atomic number = 24) is [MNR 1986; CPMT 1992]
Options:
A) 6
B) 4
C) 3
D) 1
Show Answer
Answer:
Correct Answer: C
Solution:
$ Cr_{24}=(Ar),3d^{5},4s^{1} $ but $ Cr_24^{3+}=(Ar),3d^{3},4s^{0} $