The edge length of face centred unit cubic cell is 508 pm If the radius of the cation is 110 pm the radius of the anion is
[CBSE PMT 1998]
285 pm
398 pm
144 pm
618 pm
Distance between centres of cation and anion
The edge length of a F.C.C. cell of an ionic substance is 508 pm. If the radius of the cation is 110 pm, the radius of the anion is