Please explain Exchange energy in copper

[vivtoons]

My questions exactly are:

 

Q 1: Why 3d¹⁰ 4s¹ configuration of copper is more stable than 3d⁹ 4s² in terms of exchange energy ?

 

 

Q 2 : Can a electron of 3d exchange to 4s electron, having same spin?

 

Q3: How many possible exchange sets with a parallel spins can occur in copper ?

 

Please help me asap.

 

 

 

[hypervalent_iodine]

We don't do homework questions here, sorry. Happy to help you in your understanding, but you aren't going to put in any effort to attempt these questions or explain where you're struggling, then you have come to the wrong place.

[vivtoons]

What do you mean by homework question???it is a chemistry question.If you don't know the answer then simply say that you don't know.But at least don't make excuses.

[swansont]

What we mean is that you have to show what you've done so far to answer it. These look like they are HW questions from a book. We're not going to just give you the answers — that doesn't help you understand anything.

[ashwinkirtane]

Any electron exchange is possible if and only if a more stable state is achieved. Now look, always remember these points:

1. A fully filled orbital is MOST stable

2. Then you have a HALF filled orbital.

 

ANY change that involves one e^- transfer and resulting configuration is more stable then it is possible. I'll give you an example then you yourself solve for Copper.

Chromium has atomic number 24, its outer shell configuration should have been 3d⁴ 4s² but if one electron from outer s orbital jumps to the inner d orbital it gives a more stable HALF filled configuration of 3d⁵ 4s¹. So Chromium actually has this configuration. I guess this information is enough for solving your question. Do post your answer here.

Good Luck!