A metal crystallizes in cubic close packed ccp. The atomic radius of metal is 144 pm and it's atomic mass is 197 a.m.u it's density is

Q. Gold crystallizes in a face centered cubic lattice. If the length of the edge of the unit cell is $407$ pm, calculate the density of gold as well as its atomic radius assuming it to be spherical. Atomic mass of gold $=197$ amu.

Q. Copper crystal has a face centred cubic structure. Atomic radius of copper atom is 128 pm. What is the density of copper metal? Atomic mass of copper is 63.5.

Q. When heated above ${916}^{\circ }C$, iron changes its crystal structure from body-centered cubic to cubic closed packed structure. Assuming that the metallic radius of the atom does not change, calculate the ratio of the density of the bcc crystal to that of the ccp crystal.

Q.

In cubic close packed (CCP) pattern of a metallic crystal, the coordination number is

Q. Aluminium crystallizes in a cubic close packed structure. Its metallic radius is $125$ pm. The edge length (in pm) of the unit cell and number of unit cells per cc of aluminium, respectively, are :