In the fluorite structure,the coordination number of the $Ca^{2+}$ ion is.....

The number of atoms present in a simple cubic unit cell of a molecular substance is.....

In a face-centered cubic arrangement of $A$ and $B$ atoms,$A$ atoms are at the corners of the unit cell and $B$ atoms are at the face centers. If one of the $B$ atoms is missing from one of the faces in the unit cell,the simplest formula of the compound is:

The interionic distance for $Cesium$ $chloride$ $(CsCl)$ crystal will be (where $a$ is the edge length of the unit cell):

Which of the following metals has a $ccp$ crystal structure?

Potassium crystallizes with a