An element occurring in the $bcc$ structure has $12.08 \times 10^{23}$ unit cells. The total number of atoms of the element in these cells will be:

The number of $Cl^{-}$ ions around one $Na^{+}$ in $NaCl$ crystal lattice is

Which of the following characteristics is true for $ZnS$ solid?

For an ionic crystal $A^{+}B^{-}$ with coordination number $6$,the radius ratio will be

If the cation is present in the tetrahedral void,what is the radius ratio ${r_ + }/{r_ - }$?

The unit cell of a binary compound of $A$ and $B$ metals has a $ccp$ structure with $A$ atoms occupying the corners and $B$ atoms occupying the centres of each face of the cubic unit cell. If during the crystallisation of this alloy,two $A$ atoms are missing from the unit cell,the overall composition per unit cell is: