In class, we learned why chromium (Cr) has a 4s13d5 electronic configuration instead of 4s2 3d4. By the same reasoning, shouldn’t carbon (C) have a 2s1 2p3 configuration and not the 2s2 2p2 configuration that it actually

Physical Chemistry

2nd Edition

ISBN:9781133958437

Author:Ball, David W. (david Warren), BAER, Tomas

Publisher:Ball, David W. (david Warren), BAER, Tomas

Chapter16: Introduction To Magnetic Spectroscopy

Section: Chapter Questions

Problem 16.7E

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Question

In class, we learned why chromium (Cr) has a 4s13d5 electronic configuration instead of 4s2
3d4. By the same reasoning, shouldn’t carbon (C) have a 2s1 2p3 configuration
and not the 2s2 2p2 configuration that it actually has? Explain why the 2s2 2p2 configuration is
more stable for carbon while the irregular 4s1 3d5 electronic configuration is more stable for
chromium.

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