Hello ….Arrange the following in order of increasing ionic character and please explain why so arranged ?LiH , NaH and CsH

@ jeeva 
the ionic charecter depends upon electronegativity of the atom involved the higher is the diffrence of electronegativity , the smaller will be the ionic charecter 
electronegativity decrease down the group , hence the ionic charecter will increase as , 
lih
lih is higest , nah is in the middle and csh is the last 
HOPE IT CLEARS