The coordination number of the sphere in cubic close packed $(ccp)$ structure is

If the coordination number of $Ca^{2+}$ in $CaF_2$ is $8$,then the coordination number of $F^{-}$ ion would be

In $NaCl$ lattice,the coordination number of $Cl^{-}$ ion is:

$A$ crystal is formed by two elements $X$ and $Y$ in a cubic structure. $X$ atoms are at the corners of a cube,while $Y$ atoms are at the face centers. The formula of the compound will be:

For which ionic compound is the radius ratio $0.93$?

The structure of $MgO$ is similar to $NaCl$. What would be the coordination number of magnesium?