A metal crystallises with a F.C.C. lattice. The edge of the unit cell is 408 pm. The diameter of the metal atom is

Q. A metal $M$ is crystallised in $F.C.C$ lattice. The number of unit cells in it having $2.4\times {10}^{24}$ atoms are:

Q. Sodium metal crystallises in a body centred cubic lattice with a unit cell edge of $4.29\stackrel{\circ }{A}$. The radius of $Na$ atom is approximately.

Q. Sodium metal crystallises in a body centred cubic lattice with unit cell edge of 4.29 $A^{\circ }$. The radius of sodium atom in $A^{\circ }$ is approximately

Q. Sodium metal crystallises in a body centered cubic lattice with a unit cell edge of 4.29 $\stackrel{\circ }{A}$. The radius of sodium atom is approximately:

Q. A metal crystallizes with a face centred cubic lattice. The edge of the unit cell is 408 pm. The diameter of the metal atom is: