In a face-centered cubic unit cell,what fraction of an atom at the corner is shared by the unit cell?

The number of unit cells in $58.5 \ g$ of $NaCl$ is nearly

In a cubic structure of a compound made from $X$ and $Y$,where $X$ atoms are at the corners of the cube and $Y$ atoms are at the face centers of the cube,the molecular formula of the compound is:

The face diagonal length of $f.c.c.$ cubic cell is $660 \sqrt{2} \, pm$. If the radius of the cation is $110 \, pm$,the radius of the anion is ............ $pm$.

For $bcc$ cubic coordination the value of radius ratio is

Body centered cubic lattice has a coordination number of