Isoelectronic elements and their characteristics

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kellyz_1C
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Joined: Fri Apr 06, 2018 11:05 am

Isoelectronic elements and their characteristics

Postby kellyz_1C » Wed Jun 06, 2018 12:54 pm

If two atoms are isoelectronic how does that affect their characteristics? Do they still follow the relative trends of the periodic table? (ie; electronegativity, electron affinity, size, etc...)

Betty Wolkeba section 1L
Posts: 32
Joined: Fri Apr 06, 2018 11:05 am

Re: Isoelectronic elements and their characteristics

Postby Betty Wolkeba section 1L » Wed Jun 06, 2018 1:11 pm

Two elements being isoelectronic just mean that they have the same number of electrons and the same electron configurations. They can still have different characteristics. For example, K+ and Cl- are isoelectronic with Argon, however, Cl- is larger than K+ because K+ has more protons so it'll pull its electrons in more tighter than Cl-. From that, we can then say that the atomic radius for Cl- is larger than K+, and the ionization energy for K+ is higher than Cl- (I think). Hope that helps somewhat !

Paywand Baghal
Posts: 32
Joined: Fri Apr 06, 2018 11:01 am

Re: Isoelectronic elements and their characteristics

Postby Paywand Baghal » Sat Jun 09, 2018 5:39 pm

Betty Wolkeba section 1L wrote:Two elements being isoelectronic just mean that they have the same number of electrons and the same electron configurations. They can still have different characteristics. For example, K+ and Cl- are isoelectronic with Argon, however, Cl- is larger than K+ because K+ has more protons so it'll pull its electrons in more tighter than Cl-. From that, we can then say that the atomic radius for Cl- is larger than K+, and the ionization energy for K+ is higher than Cl- (I think). Hope that helps somewhat !


Doesn't isoelectronic just mean that both molecules or atoms have the same amount of electrons?


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