Electronic Structure
Chemistry
Level
pending
What is the electronic configuration of a Chromium atom in sub-shell notation?
1s^2,2s^2,2p^6,3s^2,3p^5,3d^5,4s^1
1s^2,2s^2,2p^6,3s^2,3p^6,3d^5,4s^1
1s^2,2s^2,2p^6,3s^2,3p^6,3d^4,4s^2
1s^2,2s^2,2p^5,3s^2,3p^6,3d^5,4s^1
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From the atomic number of chromium, which is 24, the electron configuration should be:
1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 3 d 5 4 s 1
The electron configuration is extra stable when d-orbital is half full or full, hence it would borrow 1 electron from 4s sub-orbital in the case of Cr.
P/s: It would be too hard to read the answer like that. Please add L A T E X code into the answer.