Grade 11Physical Chemistry
i did not understood the eletronic configuration of chromium???
i did not understood the eletronic configuration of chromium???
1 Answer
Aarti Gupta
Chromium having atomic no.24 have expected configuration-
1s2,2s2,2p6,3s2,3p6,3d4,4s2
but the actual configuration is
1s2,2s2,2p6,3s2,3p6,3d5,4s1
This actual configuration is due to the fact that half-filled electronic configuration have extra-stability,because of symmetrical distribution of electrons and such symmetry leads to extra stability.So one of the e- from 4s orbital gets promoted to 3d orbital.Chromium is one of the element having exceptional configuration.
1s2,2s2,2p6,3s2,3p6,3d4,4s2
but the actual configuration is
1s2,2s2,2p6,3s2,3p6,3d5,4s1
This actual configuration is due to the fact that half-filled electronic configuration have extra-stability,because of symmetrical distribution of electrons and such symmetry leads to extra stability.So one of the e- from 4s orbital gets promoted to 3d orbital.Chromium is one of the element having exceptional configuration.
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