## Isoelectronic [ENDORSED]

$FC=V-(L+\frac{S}{2})$

Hellen Truong 2J
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### Isoelectronic

Are Be2+ and Li+ considered isoelectronic to F-?

Nisarg Shah 1C
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Joined: Sat Jul 22, 2017 3:00 am

### Re: Isoelectronic

No. F- gains 1 more valence electron and would have a complete octet, making it isoelectronic to the next noble gas (Ne). Be2+ and Li+ are isoelectronic to He, because they lose their 2s electrons.

Kevin Ru 1D
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### Re: Isoelectronic

Remember that atoms or ions are considered isoelectronic only when they have both the same number of valence electrons and the same electronic structure. Hope that helps!

Michelle Lu 1F
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### Re: Isoelectronic  [ENDORSED]

No, Be2+ and Li+ would actually be isoelectronic to He since Be would be losing 2 and Li would be losing 1 electron. In order to be isoelectronic, Be2+, Li+, and Ne would have to have the same number of electrons. For example, Na+ and Mg2+ would be isoelectronic to Ne.

Wayland Leung
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### Re: Isoelectronic

Are elements isoelectronic if they have the same number of valence electrons but different structure?