Writing+electron+configurations+of+ions,+and+the+copper+and+chromium+exceptions

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** Writing e- congfiguration of ions,and the copper and chromium exceptions (textbook p156-157)**


 * 1) ** Electron Configuration Exceptions **

__//** background infro: **//__** As we already learnt, the Electron Configuration was a description of the electrons in atoms occupied in the orbitals.Every atom appeared in the perodic table can expressed in the "orbital version". **
 * 

Q: Writ the electron configuration of Cr & ****Cu.

What's you Answer? Did you writing like that: Cr([Ar]4S^2 3d^4) Cu([Ar]4S^2 3d^9)

Why?If not... Cr and Cu are special! Every atom they want to be stable,but Cr and Cu can be stable if we add the extra stability. //* // //An atom or ion that is one electron short of a d^5 or d^10 configuration may have an electron configuration in which one electron is shifted grom the filled s-suvshell having the highest energy into the unfilled d-subshell.(Textbook p156 at the bottom of the page,last paragraph) //

So, the special electron configurations for Cr and Cu are: Cr([Ar]4s^1 3d^5) Cu([Ar]4s^1 3d^10)

Cr&Cu said:We really want to be stable,d-subshell is really inportant for us,neither full filled or half -filled,we're so glad!

2. Writing Electrons Configurations for ions

Hah,don't be antious of the topic,let's discuss ! Actually, it's simple and easy,trust me! We can do it!!!

As we already learnt the Electron configuration of atoms,so what about the IONS? // (* ion:An atom or molecule which possesses an electrical charge. Text book glossary P333 def) //

Oh, the ion have two different conditions ,right?we have + ions and - ions.How it works? -ions: If the #of p(protons) = #of e(electrons) the atom must be __neutral__ __.__ But the electrons are more than protons,so forms -ions.

Exmple: O²﹣

Oxygenhas 16 protons ...Electrons?

Hah,18 18-16=2 Electrons are quit big that protons,so forms O²- writing forms: O([He]2s² sp4)+2e﹣→O²-([He]2s² 2p6)

// ＜ I must apologise the ions forms it's very hard to make it excatly same with book,because the charges not easy to make it on the top right corner of atom,i hope you can understand ,also check the book form＞ //

That's very straight forward ,right?

// Have a try! //

H﹣

H is (1s¹) So, H- should be (1s²) U see? :-D

+ions: Maybe you already known,because of the protons bigger than the massive of e-. Let's remove! __// But,be careful! Please, obey the rules ! //__ ✪Remove the outermost shell who has largest n-value. // (It's easy to remove or lose the high energy level electrons,distence↑,easy to lose,remeber?It related to the LONDON FORCE) //

✪When the n-value aresame in each orbitals, remove P first, then S then D!

Exmple:

V²+

V([Ar]4s² 3d³)→2e- + V²+([Ar]3d³) **

 Oh! We are finished our topic! It's that cool?

I hope my webpage can help you to study,really!

If not,let me know,I will fix it up.

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