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+)` and `Be^(2+)`?

Options

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

Answer

D

Explanation

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