clear;
clc;
printf("\nEx1.10\n");
//page no.-12
//given
r=1.278;..........//atomic radius of Cu
n=4;..............//molecules per unit cell for F.C.C.
N=6.023*10^23;...//avagadro no.
m=63.5;..........//atomic wt. of Cu

M=(n*m)/N...........//mass of unit cell

a=(4*r*10^-8)/sqrt(2).....//lattice constant in cm

rho=M/a^3............//density of Cu in gm/c.c.

printf("\ndensity of Cu crystal is 8.9 gm/c.c.\n");