s- electrons vs p- electrons  [ENDORSED]

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MichelleTran3I
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s- electrons vs p- electrons

Postby MichelleTran3I » Thu Oct 26, 2017 1:19 am

Can someone explain to me why s- electrons have lower energy than p-electrons in the same shell? Thanks!

Johann Park 2B
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Re: s- electrons vs p- electrons  [ENDORSED]

Postby Johann Park 2B » Thu Oct 26, 2017 9:29 am

In many-electron atoms, electron-electron repulsion causes increasing orbitals to be increasing in energy (because electrons in "greater" orbitals are shielded from the full attraction of the nucleus & we know that when electrons are more strongly attracted to the nucleus, they are lower in energy). Also, s-electrons of any shell can penetrate through inner shells, while p-electrons penetrate much less.

In summary, s-orbital electrons are more tightly bound to the nucleus (shielding/penetration), and are therefore lower in energy than p-orbital electrons.

Golbarg Rahimi 3k
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Re: s- electrons vs p- electrons

Postby Golbarg Rahimi 3k » Thu Oct 26, 2017 10:05 am

Basically, the s orbitals have fewer electrons standing between them and the nucleus, therefore, they are less shielded. The p orbitals are more shielded than the s orbitals of the same shell.that is why p orbitals have higher energy.

Josh Moy 1H
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Re: s- electrons vs p- electrons

Postby Josh Moy 1H » Thu Oct 26, 2017 9:28 pm

It's because of the less shielding

Swetha Sundaram 1E
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Re: s- electrons vs p- electrons

Postby Swetha Sundaram 1E » Fri Oct 27, 2017 8:52 am

From what I understand the further the atoms the electrons are from the nucleus, the more energy they have.

Ethan Mondell 1A
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Re: s- electrons vs p- electrons

Postby Ethan Mondell 1A » Fri Oct 27, 2017 8:07 pm

For the most part it really just has to do with proximity to the nucleus. Closer the nucleus, more attraction between protons and electrons, lower energy.

804899546
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Re: s- electrons vs p- electrons

Postby 804899546 » Sat Oct 28, 2017 10:36 am

Then how come even when the 4s orbitals are filled first, they still have a higher energy than the 3d orbital, hence why we write 3d before 4s?

Humza_Khan_2J
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Re: s- electrons vs p- electrons

Postby Humza_Khan_2J » Wed Nov 01, 2017 2:13 pm

As for why the 4s has more energy than 3d, this is simply because it's in a higher energy shell. A higher n implies a higher energy level.


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