Question

The edge length of a face centered cubic cell of an ionic
substance is 508 pm. If the radius of the cation is 110 pm, the
radius of the anion is
(a) 288 pm (b) 398 pm
(c) 618 pm (d) 144 pm

Answer 1

Answer:

d

Explanation:

if edge length is 508 then dist between 2 ions will be 508/2 =254pm because one ion is also at edge centre

distance between two ions= Ranion + Rcation    

ranion = 254-110= 144pm

am i right