Need help remembering a stupid elec. chem. term....

[2014DMD]

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OK, I recently came across a gen. chem question and meant to look it up immediately but didn't. It was a weird terminology, it went something like this:

Which pair below are isoelectrically (I think that was the word):

then a couple of paired ions of different charges,
then Ag3+ and (x)3-,
then Na and K

Just wondering if anyone can figure out the term that was in the question. I know it wasn't isoelectric point.

Any help appreciated cause it's sort of driving me nuts!

Cheers.

 

[nze82]

OK, I recently came across a gen. chem question and meant to look it up immediately but didn't. It was a weird terminology, it went something like this:

Which pair below are isoelectrically (I think that was the word):

then a couple of paired ions of different charges,
then Ag3+ and (x)3-,
then Na and K

Just wondering if anyone can figure out the term that was in the question. I know it wasn't isoelectric point.

Any help appreciated cause it's sort of driving me nuts!

Cheers.

Two different atoms, ions, etc. are considered isoelectric if they have the same number of valence electrons. This is not the same as the isoelectric point!

 

[2014DMD]

that must be it! thanks!!