Edge length of `M^(+)X^(-)` (fcc structure) is `7.2^(@)A`. Assuming `M^(+)-X^(-)` contact along the
Channel: Doubtnut
Date: 2020-02-17

Edge length of `M^(+)X^(-)` (fcc structure) is `7.2^(@)A`. Assuming `M^(+)-X^(-)` contact along the cell edge, radius of `X(-)` ion is `(r_(M+)=1.6^(@)A)`: