What is the electron configuration using core notation for Se^(2-)?

1 Answer
P dilip_k
May 6, 2016

[Kr]

Explanation:

The atomic No. of Se is 34
Se^"2-" has 34+2 = 36 electrons

Electronic configuration of Se in
Normal Notation
1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2 4p^4
Electronic configuration of Se^(2-) in
Normal Notation
1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2 4p^6

In core notation it is

Krypton core i.e.[Kr]

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