Periodic TableEasy
Question
Which of the following ions has electronic configuration [Ar]3d6 ?
(At. no : Mn = 25, Fe = 26, Co = 27, Ni = 28)
(At. no : Mn = 25, Fe = 26, Co = 27, Ni = 28)
Options
A.Ni3+
B.Mn3+
C.Fe3+
D.Co3+
Solution
Write the electronic configurations of given ions and find the correct answer.
Ni3+ (28) = [Ar] 3d7
Mn3+ (25) = [Ar] 3d4
Fe3+ (26) = [Ar] 3d5
Co3+ (27) = [Ar] 3d6
Ni3+ (28) = [Ar] 3d7
Mn3+ (25) = [Ar] 3d4
Fe3+ (26) = [Ar] 3d5
Co3+ (27) = [Ar] 3d6
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