Why is the electron configuration for Ni $1 s^{2}$ $1s^2$ $2 s^{2}$ $2s^2$ $2 p^{4}$ $2p^4$ $3 s^{4}$ $3s^4$ $3 p^{4}$ $3p^4$ $4 s^{2}$ $4s^2$ $3 d^{8}$ $3d^8$ and not $1 s^{2}$ $1s^2$ $2 s^{2}$ $2s^2$ $2 p^{4}$ $2p^4$ $3 s^{4}$ $3s^4$ $3 p^{4}$ $3p^4$ $3 d^{10}$ $3d^10$ ?

Question

Why is the electron configuration for Ni $1 s^{2}$ $1s^2$ $2 s^{2}$ $2s^2$ $2 p^{4}$ $2p^4$ $3 s^{4}$ $3s^4$ $3 p^{4}$ $3p^4$ $4 s^{2}$ $4s^2$ $3 d^{8}$ $3d^8$ and not $1 s^{2}$ $1s^2$ $2 s^{2}$ $2s^2$ $2 p^{4}$ $2p^4$ $3 s^{4}$ $3s^4$ $3 p^{4}$ $3p^4$ $3 d^{10}$ $3d^10$ ?

1 Answer

Impact of this question

8237 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2016-08-22T00:08:51

Neither electron configuration for Nickel is correct.

Explanation:

An s sublevel can only hold two electrons because it has only one orbital. Each orbital in any sublevel can hold only two electrons. Both of the electron configurations in your question have a ${3s}^{4}$ $"3s"^4"$ sublevel, which is impossible.

The atomic number for nickel is 28. If it is neutral, one atom of nickel has 28 protons and 28 electrons. Both of the electron configurations for nickel in your question have only 26 electrons.

In the second configuration, the ${4s}^{2}$ $"4s"^2"$ sublevel is missing.

Nickel's electron configuration is ${1s}^{2} {2s}^{2} {2p}^{6} {3s}^{2} {3p}^{6} {4s}^{2} {3d}^{8}$ $"1s"^2"2s"^2"2p"^6"3s"^2"3p"^6"4s"^2"3d"^8"$ . The $4 s$ $4"s"$ sublevel fills before the $3d$ $"3d"$ sublevel because the $4s$ $"4s"$ sublevel has lower energy than the $3d$ $"3d"$ sublevel.

enter image source here

Science

Math

Humanities

... and beyond

Why is the electron configuration for Ni $1 s^{2}$ $1s^2$ $2 s^{2}$ $2s^2$ $2 p^{4}$ $2p^4$ $3 s^{4}$ $3s^4$ $3 p^{4}$ $3p^4$ $4 s^{2}$ $4s^2$ $3 d^{8}$ $3d^8$ and not $1 s^{2}$ $1s^2$ $2 s^{2}$ $2s^2$ $2 p^{4}$ $2p^4$ $3 s^{4}$ $3s^4$ $3 p^{4}$ $3p^4$ $3 d^{10}$ $3d^10$ ?

1 Answer

Explanation:

Related questions

Impact of this question

Science

Math

Humanities

... and beyond

Why is the electron configuration for Ni 1s21s^2 2s22s^2 2p42p^4 3s43s^4 3p43p^4 4s24s^2 3d83d^8 and not 1s21s^2 2s22s^2 2p42p^4 3s43s^4 3p43p^4 3d103d^10?

1 Answer

Explanation:

Related questions

Impact of this question

Why is the electron configuration for Ni $1 s^{2}$ $1s^2$ $2 s^{2}$ $2s^2$ $2 p^{4}$ $2p^4$ $3 s^{4}$ $3s^4$ $3 p^{4}$ $3p^4$ $4 s^{2}$ $4s^2$ $3 d^{8}$ $3d^8$ and not $1 s^{2}$ $1s^2$ $2 s^{2}$ $2s^2$ $2 p^{4}$ $2p^4$ $3 s^{4}$ $3s^4$ $3 p^{4}$ $3p^4$ $3 d^{10}$ $3d^10$ ?