If an atom is present in the centre of the cube,the participation of that atom per unit cell is

Potassium fluoride $(KF)$ has a $NaCl$ type structure. If the edge length of the unit cell is $a$,what is the distance between $K^+$ and $F^-$ ions?

What is the coordination number of the $Ca^{2+}$ ion in the fluorite structure?

Identify the unit cell from the following that contains four particles in it.

The number of atoms contained in one face-centred cubic $(FCC)$ unit cell of a monoatomic substance is:

An alloy made up of $A$ and $B$ metals crystallises in a cubic lattice, where $B$ atoms occupy the corners and $A$ atoms occupy the face centers. The formula of the alloy formed is