ionization energy and isoelectronic ions

[pharmRxn]

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how do we rank the 2nd ionization energy of isoelectronic ions from highest to lowest?

 

[inaccensa]

how do we rank the 2nd ionization energy of isoelectronic ions from highest to lowest?

Based on size?

 

[Isoprop]

Generally speaking, the larger the charge of the atom, the harder it is to pull off additional electrons. So if you have:

X, Y+, and Z2+, and you pull off two electrons, the second electron is going to come off easier from X+ than Z3+.

<assuming the example i used are isoelectronic>