The Charge/size Ratio Of A Cation Determines Its Polarizing Power. Which One Of The Following Sequences Represents The Increasing Order Of The Polarizing Power Of The Cationic Species, K+, Ca2+, Mg2+, Be2+? 

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Question

The charge/size ratio of a cation determines its polarizing power. Which one of the following sequences represents the increasing order of the polarizing power of the cationic species, K+, Ca2+, Mg2+, Be2+? 

Solution

Correct option is

K+ < Ca2+ < Mg2+ < Be2+

 

Higher the charge/size ratio, more is the polarizing power.  

∴             K+ < Ca2+ < Mg2+ < Be2+

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