d-block electron configurations

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Yasmin Rizal 1C
Posts: 8
Joined: Wed Sep 21, 2016 2:59 pm

d-block electron configurations

Postby Yasmin Rizal 1C » Fri Nov 11, 2016 5:18 pm

Are there any tips/tricks/shortcuts to memorizing electron configs for d-block atoms? I know for Chem 14A purposes we only need to know exceptions for Co and Cu, but what about the rest?

Ruiz Samantha 2C
Posts: 24
Joined: Wed Sep 21, 2016 2:58 pm

Re: d-block electron configurations

Postby Ruiz Samantha 2C » Fri Nov 11, 2016 11:24 pm

So for example if they gave us: Ti2+
I would write the noble gas electron configuration like this [Ar] 3d2 4s2
And then just take away 2 e- from the last number you wrote 4s2
-Your noble gas electron configuration for Ti2+ then would be: [Ar] 3d2

Rachel Wile 2D
Posts: 49
Joined: Sat Jul 09, 2016 3:00 am

Re: d-block electron configurations

Postby Rachel Wile 2D » Wed Nov 23, 2016 7:48 am

You only need to memorize the elements that have 4 or 9 valence electrons in the d-orbital. Since they are one away from a half-filled or filled shell, they will take 1 away from the 4s shell because it is lower energy to have a half-filled or filled d-orbital. The other d-block elements have a "normal" electron configuration.

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