Valence e in d block

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annikaying
Posts: 94
Joined: Sat Sep 14, 2019 12:16 am

Valence e in d block

Postby annikaying » Wed Oct 23, 2019 4:11 pm

How do you count the valence e in the d block? For example how many valence e does Zn have and why?

Rida Ismail 2E
Posts: 139
Joined: Sat Sep 07, 2019 12:16 am

Re: Valence e in d block

Postby Rida Ismail 2E » Wed Oct 23, 2019 4:21 pm

I believe that zinc has only 2 electrons in its valence shell because of the 4s shell. So its valence shell of 4s is filled making it have only 2 valence electrons.

Qiu Ya Wu 4I
Posts: 107
Joined: Fri Sep 20, 2019 12:17 am

Re: Valence e in d block

Postby Qiu Ya Wu 4I » Wed Oct 23, 2019 4:27 pm

Writing out the d block elements' electric configurations would help you immensely in counting their valence electrons! Just remember to only count electrons in the outermost shell. The electron configuration of Zinc is formally [Ar] 3d¹⁰4s², but you should only focus on the electrons in the outermost shell (4th shell).

Osvaldo SanchezF -1H
Posts: 122
Joined: Wed Sep 18, 2019 12:21 am

Re: Valence e in d block

Postby Osvaldo SanchezF -1H » Wed Oct 23, 2019 4:35 pm

Well one one of the best ways to find out the valence electrons is to simply just how many electrons it took to get to the final shell that it has which you can tell from that period. From there, whatever is left will be the Valence electrons.

Jacob Puchalski 1G
Posts: 97
Joined: Fri Aug 09, 2019 12:16 am

Re: Valence e in d block

Postby Jacob Puchalski 1G » Wed Oct 23, 2019 6:03 pm

So do most d-block elements have only a couple of valence electrons?

Sebastian Lee 1L
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Re: Valence e in d block

Postby Sebastian Lee 1L » Wed Oct 23, 2019 8:40 pm

Yes I believe most d-block elements will only have the s-shell valence electrons of the energy level above the d. This is helpful to know when considering making cations from these metals. The electrons will be removed from the outermost shell which consists only of its highest energy s-shell electrons. So if I have Zn2+, it will have an electron configuration of [Ar] 3d10. Likewise, Ga3+ will also have [Ar] 3d10.


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