Valence electrons  [ENDORSED]

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Emma Li 2C
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Valence electrons

Postby Emma Li 2C » Sun Oct 29, 2017 4:23 pm

For elements with 3d and 4s electrons, should the valence electrons include the 3d block as well as the 4s block?
Thank you!

Rebecca Cheung 1E
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Re: Valence electrons

Postby Rebecca Cheung 1E » Sun Oct 29, 2017 4:56 pm

Yes, those are the outermost electrons (valence e-).

Madeline Musselman 3H
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Re: Valence electrons

Postby Madeline Musselman 3H » Wed Nov 01, 2017 4:16 pm

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.

Sonja Kobayashi 1H
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Joined: Fri Sep 29, 2017 7:04 am

Re: Valence electrons  [ENDORSED]

Postby Sonja Kobayashi 1H » Sat Nov 25, 2017 1:28 pm

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!

Clarissa Molina 1D
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Re: Valence electrons

Postby Clarissa Molina 1D » Fri Dec 08, 2017 1:01 am

For question 2.37b, why are electrons in an s-orbital more effective than those in other orbitals at shielding electrons from nuclear charge?

Kaelie Blanes-Ronda 2L
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Re: Valence electrons

Postby Kaelie Blanes-Ronda 2L » Fri Dec 08, 2017 10:31 pm

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.

Caroline Crotty 1D
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Re: Valence electrons

Postby Caroline Crotty 1D » Sun Apr 29, 2018 4:02 pm

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.

Amir Akhavan 1E
Posts: 34
Joined: Fri Apr 06, 2018 11:01 am

Re: Valence electrons

Postby Amir Akhavan 1E » Sun Apr 29, 2018 8:45 pm

Yes those are considered to be the valance electrons.


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