Question

lif is ionic but licl is covalent why

Answer 1

According to Fajan’s rule “with the increase in size of anion the covalent character in a molecule increases”. With the increase in size of the anion the electron cloud density shifted to center, thus increases the covalent character. In LiI the anion 'I'  has bigger size compared anion 'F' in LiF, therefore LiI is more covalent than LiF.

Answer 2

Answer:

Explanation:

In the compound LiF

Fluorine = highly electronegative ( charge = -1 )

Li = highly electropositive. (charge = +1 )

so generally , ionic = x+y- = LiF

In the compound LiCl,

chlorine = moderately electronegative ( charge = -1 )

Li = highly electropositive ( charge = +1 )

so both of them will balance and not share completely