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+//Ex1_11
+
+clc;
+
+//Given:
+mh=1.0078;
+mn=1.0087;
+ma=4.0026;
+mo=15.9949;
+Ah=4.0026; // atomic mass of helium
+Ao=15.9949; // atomic mass of oxygen
+
+//solution:
+
+// part (a)
+
+B1=(2*mh+2*mn-ma)*931; // in MeV
+Bh=B1/Ah;
+printf("\n The mean binding energy of helium atom in MeV is = %f ",Bh)
+
+// part (b)
+
+B2=(8*mh+8*mn-mo)*931; // in MeV
+Bo=B2/Ao;
+printf("\n The mean binding energy of oxygen atom in MeV is = %f ",Bo)