Rank C,N,O,F on Ionization Energy

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Michael Nirula
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Joined: Fri Sep 28, 2018 12:27 am

Rank C,N,O,F on Ionization Energy

Postby Michael Nirula » Sun Nov 04, 2018 12:48 pm

Yesterday in the peer review we ranked C,N,O and F on ionization energies and I remember the ranking was an exception to the usual rule of ionization energies increasing across the period. Can someone explain this?

Dimitri Speron 1C
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Re: Rank C,N,O,F on Ionization Energy

Postby Dimitri Speron 1C » Sun Nov 04, 2018 12:58 pm

The reason that nitrogen has a higher ionization energy than oxygen is because oxygen has an orbital with 2 electrons in it, which results in some electron-electron repulsion. Whereas nitrogen has just one electron in each of its 2p orbitals and therefore lacks that same electron-electron repulsion.

Michael Nirula
Posts: 32
Joined: Fri Sep 28, 2018 12:27 am

Re: Rank C,N,O,F on Ionization Energy

Postby Michael Nirula » Sun Nov 04, 2018 1:32 pm

Ok great thanks


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