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Valence electrons

Posted: Sun Oct 29, 2017 4:23 pm
by Emma Li 2C
For elements with 3d and 4s electrons, should the valence electrons include the 3d block as well as the 4s block?
Thank you!

Re: Valence electrons

Posted: Sun Oct 29, 2017 4:56 pm
by Rebecca Cheung 1E
Yes, those are the outermost electrons (valence e-).

Re: Valence electrons

Posted: Wed Nov 01, 2017 4:16 pm
by Madeline Musselman 3H
The 4s block is where the outermost electrons are located (valence electrons) rather than the 3d block. When you write out the electron configuration for Magnesium, for example, the electron configuration is [Arg] 4s^2 3d^5 where the valence electrons are located in 4s with 2 valence electrons. I hope this little outline helps.

Re: Valence electrons  [ENDORSED]

Posted: Sat Nov 25, 2017 1:28 pm
by Sonja Kobayashi 1H
Hello everyone!
Yes, all of those electrons are valence electrons so it is important to know that all of those electrons play a role in how the element forms chemical bonds with other elements!

Re: Valence electrons

Posted: Fri Dec 08, 2017 1:01 am
by Clarissa Molina 1D
For question 2.37b, why are electrons in an s-orbital more effective than those in other orbitals at shielding electrons from nuclear charge?

Re: Valence electrons

Posted: Fri Dec 08, 2017 10:31 pm
by Kaelie Blanes-Ronda 2L
The 2s electrons can be taken from the atom which would leave the other electrons from different orbitals behind, therefore shielding them from other electronegative atoms.

Re: Valence electrons

Posted: Sun Apr 29, 2018 4:02 pm
by Caroline Crotty 1D
When we fill in the electron orbitals, we have to follow Aufbau's method. This means all levels must be present, including the 3d and 4s levels.

Re: Valence electrons

Posted: Sun Apr 29, 2018 8:45 pm
by Amir Akhavan 1E
Yes those are considered to be the valance electrons.