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the electronic configuration of cu is4s1 ,3d10 and ofcr is 4s1 3d5,cu prefers to filled d shell and in cu s d both are half filled.as there bis very short energy difference therefore electron used to jumps within d and s sub shell causing irregular valency of the elements

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Q: Why do Cr and Cu exhibit irregular Configuration?
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Related questions

Which of these metals has the hardest oxidation Cu Al Fe or Cr?

Cu


What is the electron configuration of cu plus 1?

The electron configuration of Cu2+ is [Ar]3d94s0.


Why do Cr and Cu doesn't contain a a full 4s orbital?

In the case of chromium (Cr), the electron configuration of 3d54s1 is more stable than 3d44s2. A half-filled sublevel is more stable than a sublevel that is less than half full. In the case of copper (Cu), the electron configuration of 3d104s1 is more stable than 3d94s2, again because a full sublevel and a half-filled sublevel is more stable.


What is the electronic configuration of cu and why?

Ca 4s23d9


What is the electron configuration notation for Cu?

The electronic configuration od Cu is [Ar] 3d10 4s1 This is an exception to the aufbau principle which would predict [Ar] 3d9 4s2.


What elementscan exhibit more than one valence state Fe Cu Co NI?

actually all the elements listed can exhibit.


Is Cr and Cu has same atomic radius?

Only the atomic radius is equivalent - 128 pm.


How many unpaired electrons present in cu?

There is 1 unpaired electron in Copper (Cu)


Which noble gas would be listed in the noble-gas configuration of copper Cu?

Argon


What is the eletron configuration of Co?

Cu+3 reported formally in 2007. Cu 1 e's in 4S and 10 e's in 3D Cu+3 0 e's in 4S and 8 e's in 3D LFSE suggets the existence of Cu+3.


What is the correct electron configuration for Cu?

The electron configuration of copper is: [Ar]4s13d10. It isn't 4s23d9 because Cu is able to obtain a more stable electron configuration when it takes an electron from the 4s and adds it to 3d. A half filled 4s and a completely filled 3d is more stable.


What is the configuration of cu?

1s2, 2s2, 2p6, 3s2, 3p6, 4s1, 3d10 or [Ar]3d10, 4s1