Chemistry Forum

I am having a really hard time understanding the concept of isoelectronic . If anyone could help me that would be awesome!

NH₄+ is isoelectronic with (NH₃, NO₃-, AlCl₄-, AlCl₃)

Al₃+ is not isoelectronic with (Na, F, Ca₂, Mg₂)

Ammonium NH₄+ is normally isoelectronic with BH₄- and CH₄. Same orbital sp3 configuration.
What fits here would be only AlCl₄- , but it's in 3 periode.

Al 3+ is not isoelectronic with (Na, F, Ca₂, Mg₂),

Makes no sense because Ca₂ and Mg₂ not existing, or do you mean Mg 2+ and Ca 2+. The same for Na and F, Na+ and F- is existing and isoelectronic.

Al 3+ and Mg 2+ fits each other.

geometry dash spamNH₄⁺ is isoelectronic with NH₃ because both have 10 electrons.
Al³⁺ is not isoelectronic with Ca²⁺ since Al³⁺ has 10 electrons and Ca²⁺ has 18.
But now I’m wondering — why is NH₄⁺ isoelectronic with NH₃ even though one is a cation and the other is neutral?

NH₃ and NH₄ + are isoelectronic. If you get ripped off the H, then N 3- will be remain in both cases.

NH₃ => 3 H+ + N 3-

NH₄+ => 4 H+ + N 3-


BH₄-, CH₄ and NH₄+ are also isoelectronic. The amount of electrons 10 are the same.


https://slideplayer.com/slide/5247022/1 ... pecies.jpg

Al 3+ And Mg 2+ can be compared.

Other examples

https://search-static.byjusweb.com/ques ... 760f4c.jpg