Zeff HW 2.37

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ErinKim1I
Posts: 31
Joined: Fri Apr 06, 2018 11:03 am

Zeff HW 2.37

Postby ErinKim1I » Wed May 09, 2018 11:32 am

2.37 asks: True or False? Zeff for an electron in a p-orbital is lower than for an electron in an s-orbital in the same shell.

The statement is true, but I'm confused because I thought that as you go across a group (which would have the same shell), Zeff increases.
Can someone explain where I went wrong?

Thanks

Kara Justeson 1B
Posts: 31
Joined: Fri Apr 06, 2018 11:03 am

Re: Zeff HW 2.37

Postby Kara Justeson 1B » Wed May 09, 2018 11:59 am

For electrons in the s orbital, they're less shielded than electrons in the p-orbital and therefore the s orbital would have a higher Zeff value. Since Zeff is the positive charge the electron experiences, the less shielding and closer they are to the nucleus, the higher their zeff will be. So, I think the trend you are talking about would work for elements all in the same orbital, but if they're in different orbitals (even if they're in the same shell), their zeff could differ.

Nicole Shak 1L
Posts: 35
Joined: Wed Nov 22, 2017 3:03 am

Re: Zeff HW 2.37

Postby Nicole Shak 1L » Wed May 09, 2018 8:40 pm

I had the same confusion, since Zeff increases across a period, but I think that for this question, it's looking at just one atom, where the s orbital is closer to the nucleus and the p orbital is farther away from the nucleus.


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