Question
Question: The numbers of d-electrons retained in Fe2+ (atomic number Fe = 26) ion is...
The numbers of d-electrons retained in Fe2+ (atomic number Fe = 26) ion is
A
3
B
4
C
5
D
6
Answer
6
Explanation
Solution
26Fe = 1s2, 2s2, 2p6, 3s2, 3p6, 3d6, 4s2,
Fe++ = 1s2, 2s2, 2p6, 3s2, 3p6, 3d6
The number of d -electrons retained in Fe2+ = 6.
Therefore, (3) is correct option.