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diff --git a/3665/CH1/EX1.3/Ex1_3.sce b/3665/CH1/EX1.3/Ex1_3.sce
new file mode 100644
index 000000000..f94fa722e
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+++ b/3665/CH1/EX1.3/Ex1_3.sce
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+clc//
+//
+//
+
+//Variable declaration
+e=1.602*10^-19;   //charge of electron(c)
+epsilon0=8.85*10^-12;    //permittivity(C/Nm)
+r0=236*10^-12;     //seperation(m)
+N=6.022*10^20;
+IP=5.14;     //ionisation energy of A(kJ/mol)
+EA=3.65;    //electron affinity for B(kJ/mol)
+
+//Calculation
+Ue=-e^2/(4*%pi*epsilon0*r0*e);    //potential energy(eV)
+BE=-Ue-IP+EA;      //bond energy(eV)
+
+//Result
+printf("\n bond energy is %0.2f eV",BE)