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diff --git a/1694/CH1/EX1.17/EX1_17.sce b/1694/CH1/EX1.17/EX1_17.sce
new file mode 100644
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+clear;
+clc;
+printf("\nEx1.17\n");
+//page no.-32
+//given
+n=8;...........//no. of atoms per unit cell
+a=5.6*10^-10;....//lattice constant in m
+M=710.59;........//atomic wt. of Ge
+N=6.02*10^26;....//avagadro no.
+
+rho=(n*M)/(a^3*N)........//density
+
+printf("\ndensity is 53771 kg/m^3\n");