Question

write the valencies of Fe in FeCl2 and Fecl3

Answer 1

As we know, $Fe$ is the symbol for the element iron. 
The valency of $Fe$ in $FeCl_{2}$ is 2. 
The valency of $Fe$ in $FeCl_{3}$ is 3. 

Hope this may help you. 

Answer 2

in FeCl2 val. of Fe is 2
in FeCl3 val. of Fe is 3