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Author Topic: Which Ion has the largest radius?  (Read 2325 times)

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Boxxxed

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Which Ion has the largest radius?
« on: October 28, 2010, 10:45:19 AM »

Options are O2-, N3-, F-


N3- is largest
I know the periodic trends so the question is do the positions in the periodic table have a larger effect than having an additional electron?
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JustinCh3m

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Re: Which Ion has the largest radius?
« Reply #1 on: October 28, 2010, 06:53:33 PM »

this question doesn't really concern itself with the trend that "radius increases from top left to bottom right of the Periodic Table."

Instead, realize that each of the 3 ions has a total of 10e-.  That being said, how many protons does each of the 3 ions have? 

The greater the # of protons, the greater the "pull" or "attraction" there will be on the "electron cloud".
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