When is a cation highly polarising ? Which alkali metal cation has the highest polarising power ?

When is a cation highly polarising ? Which alkali metal cation has the

1.	When is a cation highly polarising ? Which alkali metal cation has the highest polarising power ?
Answer» Solution :A cation is HIGHLY POLARISING if its charge/SIZE ratio is very high. Because of its small size ,`Li^(+)` ion has the highest polarising power AMONG the ALKALI metal ions.