Which one of the following ions has electronic configuration
[Ar] 3d⁶ ?
(a) Ni³⁺ (b) Mn³⁺
(c) Fe³⁺ (d) Co³⁺
(At. Nos. Mn = 25, Fe = 26, Co = 27, Ni = 28)
Answers
Answer:
answer is co^3+
Explanation:
I hope it will help you out there
(d) Co³⁺ ion has an electronic configuration of [Ar] 3d⁶.
• [Ar] represents an electron count of 18 as Argon has a total number of 18 electrons in its shells.
(a) Ni³⁺
The number of electrons in Ni (28) is 28.
Therefore, Ni³⁺ has 28 - 3 = 25 electrons.
The electronic configuration of Ni³⁺ is represented as follows :
[Ar] 3d⁷
(b) Mn³⁺
The number of electrons in Mn (25) is 25.
Therefore, Mn³⁺ has 25 - 3 = 22 electrons.
The electronic configuration of Mn³⁺ is represented as follows :
[Ar] 3d⁴
(c) Fe³⁺
The number of electrons in Fe (26) is 26.
Therefore, Fe³⁺ has 26 -3 = 23 electrons.
The electronic configuration of Fe³⁺ is represented as follows :
[Ar] 3d⁵
(d) Co³⁺
The number of electrons in Co (27) is 27.
Therefore, Co³⁺ has 27 -3 = 24 electrons.
The electronic configuration of Co³⁺ is represented as follows :
[Ar] 3d⁶