chem from destroyer

[datdat]

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from q.203, strontium cation is smaller than sulfer anion.... why this is true? Sr is way down from S so it's way bigger if though it looses some electrons...

could anyone give me the clear reason for this?

 

[zellyen]

usually cations hold onto their electrons tighter making them smaller than anions, but these two are actually kind of far apart so i am not sure