The electron configuration for chromium is - -Ar-4s-1 3d-5-Select the best explanation for this irregular electron configuration-A half-filled d orbitals is slightly lower is energy than the - 4s- thus filling first-The - 4s- orbital is at a lower energy than the - 3d- orbital- thus filling first-Chromium is a transition metal and its electrons are loosely held- d- orbitals are dominant and shield electrons from orbitals close in energy-

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Molecular Orbitals of Carbon

The electron ...

Question

The electron configuration for chromium is $[A r] 4 s^{1} 3 d^{5}$ .
Select the best explanation for this irregular electron configuration.

A half-filled d orbitals is slightly lower is energy than the

4 s

, thus filling first.

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The

4 s

orbital is at a lower energy than the

3 d

orbital, thus filling first.

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Chromium is a transition metal and its electrons are loosely held.

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d

orbitals are dominant and shield electrons from orbitals close in energy.

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Similar questions

C u

[A r] 4 s^{1} 3 d^{10}

M n^{2 +}

3 d^{5}

List - I	List - II
I) The electrons of same orbital differ in spin	a) Stability of half filled sublevel
II) Order of energy of orbitals is $2 s, 2 p, 3 s, 3 p, 4 s$	b) Stability of completely filled sublevel
III) Electronic configuration of $N$ is $1 s^{2} 2 s^{2} 2 p^{3}$	c) Pauli's principle
IV) Electric configuration of $C u$ is [Ar] $4 s^{1} 3 d^{10}$	d) Aufbau principle

3 d^{5} 4 s^{1}

3 d^{10} 4 s^{1}

3 r d

4 s

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