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Give the correct electron configurations of Cr and Cu. Explain why they do not have the expected electron configurations. a) Which of the following are correct electron configuration(s) for Cr? a) [Ar]3d44s2 b) [Ar]3d54s1 c) [Ar]4s23d5 d) [Ar]4s13d4   b) Which of the following are correct electron configuration(s) for Cu? a) [Ar]3d94s2 b) [Ar]3d104s1 c) [Ar]4s13d9 d) [Ar]4s23d10   c) Why do Cr and Cu not have the expected electron configurations? a) Half filled orbitals are more stable than partially filled orbitals. b) Completely filled orbitals are more stable than partially filled orbitals. c) Partially filled orbitals are more stable than completely filled orbitals. d) Moving an electron from the s to d orbital lowers the energy of the atom. e) Moving an electron from the s to d orbital increases the energy of the atom.

Give the correct electron configurations of Cr and Cu. Explain why they do not have the expected electron configurations. a) Which of the following are correct electron configuration(s) for Cr? a) [Ar]3d44s2 b) [Ar]3d54s1 c) [Ar]4s23d5 d) [Ar]4s13d4   b) Which of the following are correct electron configuration(s) for Cu? a) [Ar]3d94s2 b) [Ar]3d104s1 c) [Ar]4s13d9 d) [Ar]4s23d10   c) Why do Cr and Cu not have the expected electron configurations? a) Half filled orbitals are more stable than partially filled orbitals. b) Completely filled orbitals are more stable than partially filled orbitals. c) Partially filled orbitals are more stable than completely filled orbitals. d) Moving an electron from the s to d orbital lowers the energy of the atom. e) Moving an electron from the s to d orbital increases the energy of the atom.

Principles of Modern Chemistry
Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter5: Quantum Mechanics And Atomic Structure
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29) Give the correct electron configurations of Cr and Cu. Explain why they do not have the expected electron configurations.

a) Which of the following are correct electron configuration(s) for Cr?

a) [Ar]3d44s2
b) [Ar]3d54s1
c) [Ar]4s23d5
d) [Ar]4s13d4
 
b) Which of the following are correct electron configuration(s) for Cu?

a) [Ar]3d94s2
b) [Ar]3d104s1
c) [Ar]4s13d9
d) [Ar]4s23d10
 
c) Why do Cr and Cu not have the expected electron configurations?

a) Half filled orbitals are more stable than partially filled orbitals.
b) Completely filled orbitals are more stable than partially filled orbitals.
c) Partially filled orbitals are more stable than completely filled orbitals.
d) Moving an electron from the s to d orbital lowers the energy of the atom.
e) Moving an electron from the s to d orbital increases the energy of the atom.
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