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Posted: Sat Nov 11, 2017 1:48 pm
Are Be2+ and Li+ considered isoelectronic to F-?
Posted: Sat Nov 11, 2017 2:02 pm
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.
Posted: Sat Nov 11, 2017 2:30 pm
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!
Re: Isoelectronic [ENDORSED]
Posted: Sat Nov 11, 2017 3:44 pm
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.
Posted: Sun Nov 12, 2017 4:35 pm
Are elements isoelectronic if they have the same number of valence electrons but different structure?