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^+,Ca^(2+), Mg^(2+), Be^(2+)`

Options

A. `Be^(2+) lt K^(+) lt Ca^(2+) lt Mg^(2+)`
B. `K^(+)lt Ca^(2+) lt Mg^(2+) lt Be^(2+)`
C. `Ca^(2+) lt Mg^(2+) lt Be^(2+) lt Ca^(2+)`
D. `Mg^(2+) lt Be^(2+) lt K^(+) lt Ca^(2+)`

Answer

B

Explanation

Higher the charge/size ratio higher is the polorising power.