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Topic: Periodic Properties. Oraganize form smallest ionic/atomic radius to largest.  (Read 3187 times)

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Offline nightowl1

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Periodic Properties. Oraganize form smallest ionic/atomic radius to largest.
« on: October 17, 2009, 08:19:35 PM »
The problem is asking me to organize the following from smallest atomic/ionic radius to largest atomic/ionic radius.
I know that atomic/ionic radius increases at you move diagonally downward to the bottom left of the periodic table. But im just not sure where to put Ar.

Ca+2 <  K+  <  Cl- < Ar

Im not sure where to put the Ar.
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Offline Yggdrasil

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Re: Periodic Properties. Oraganize form smallest ionic/atomic radius to largest.
« Reply #1 on: October 17, 2009, 09:59:55 PM »
Each of these species will have the same number of electrons.  In which species will the nucleus exert the most attractive forces on the electrons?
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