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+
+//Ex1_12
+
+clc;
+
+//Given:
+mh=1.0078;
+mn=1.0087;
+ABe=8.0053; // atomic mass of beryllium
+
+//solution:
+
+B1=(4*mh+4*mn-ABe)*931; // in MeV
+Bh=B1/ABe;
+printf("\n The mean binding energy of Be atom in MeV is = %f ",Bh)
+
+disp("From previous problem we have the avg. binding energy of helium atom is        7.08 MeV, Hence Be is unstable to fission into 2 alphas")