Which of the following has the largest ionic radius

[From: ] [author: ] [Date: 12-12-23] [Hit: ]

http://www.bing.com/images/search?If you just compared the Rb with the I atoms uncharged Rb would be bigger but charging them into ions makes I^- almost as big as Rb neutral, and way bigger than Rb^+-I-1 will have the largest ionic radius. Ionic radius increases as you move down the periodic table,......

Rb+1 or I-1 ? Why?

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I-
adding electrons bloats up the ion (the minus)
taking electrons shrinks (the plus)
http://www.bing.com/images/search?q=peri…
If you just compared the Rb with the I atoms uncharged Rb would be bigger but charging them into ions makes I^- almost as big as Rb neutral, and way bigger than Rb^+

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I-1 will have the largest ionic radius. Ionic radius increases as you move down the periodic table, therefore I-1 (now Xe) has a larger radius than Rb+1 (now Kr) since XE is further down the periodic table than KR

1

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