In which compound is $8:8$ coordination found?

The number of octahedral voids in a unit cell of a cubical closest packed structure is

How many formula units are there in the unit cell of sodium chloride $(NaCl)$?

In an end-centered unit cell,the body diagonal contains two additional atoms. What is the total number of atoms present in the unit cell?

The coordination number in $hcp$ is

$A$ compound contains $Ca, Ti$ and $O$ elements. If $Ca^{2+}$ ions are at the corners of the cube,$Ti$ ions are at the body center,and $O^{2-}$ ions are at the face centers,then the molecular formula of the compound and the oxidation state of $Ti$ are respectively ........