Which electron configuration violates Hund's rule? A) [He]2s²2px²2py®2pz' B) [He]2s°2px²2py'2pz? C) [He]2s²2px'2py 2pz? D) [He]2s°2px²2py? E) [He]2s°2px'2py'2pz?
Which electron configuration violates Hund's rule? A) [He]2s²2px²2py®2pz' B) [He]2s°2px²2py'2pz? C) [He]2s²2px'2py 2pz? D) [He]2s°2px²2py? E) [He]2s°2px'2py'2pz?
Physical Chemistry
2nd Edition
ISBN:9781133958437
Author:Ball, David W. (david Warren), BAER, Tomas
Publisher:Ball, David W. (david Warren), BAER, Tomas
Chapter15: Introduction To Electronic Spectroscopy And Structure
Section: Chapter Questions
Problem 15.22E
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![Which electron configuration violates Hund's rule?
A) [He]2s°2px²2py 2pz'
B) [He]2s°2px²2py'2pz?
C) [He]2s²2px'2py®2pz?
D) [He]2s²2px²2py?
E) [He]2s°2px'2py'2pz?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F0588345a-8d10-4776-bef5-4c38872e9da7%2Fabad0034-4852-44d0-bc5d-d5886713733c%2F7ue9hkn_processed.png&w=3840&q=75)
Transcribed Image Text:Which electron configuration violates Hund's rule?
A) [He]2s°2px²2py 2pz'
B) [He]2s°2px²2py'2pz?
C) [He]2s²2px'2py®2pz?
D) [He]2s²2px²2py?
E) [He]2s°2px'2py'2pz?
Expert Solution
Hund's rule:
According to the Hund's rule of maximum multiplicity:
The electrons are filled in the orbitals of subshells (arranged in the increasing order of the energy) singly first, then the pairing of electrons starts.
This is specially true for subshells which have multiple degenerate orbitals (such as p subshell with 3 degenerate orbitals, d subshell with 5 degenerate orbitals and f subshell with 7 degenerate orbitals.. and so on).
Three degenerate orbitals of 2p subshell 2px, 2py and 2pz should be singly filled with electron in any order and then pairing of electron should start in the same order.
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