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?

Answered: Which electron configuration violates…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

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 2p_x, 2p_yand 2p_zshould be singly filled with electron in any order and then pairing of electron should start in the same order.

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