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+{
+"cells": [
+ {
+		   "cell_type": "markdown",
+	   "metadata": {},
+	   "source": [
+       "# Chapter 11: Properties of Ionic Crystals"
+	   ]
+	},
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 11.1: Solution_for_a_and_b.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"clear\n",
+"clc\n",
+"disp('Exa-11.1(a)');\n",
+"c=769*10^3; Na=6.023*10^23; JeV=1.6*10^-19; //various constants and given values\n",
+"Be=c/(Na*JeV);        //Binding energy of an ion pair in the lattice\n",
+"printf('The experimental value was found out to be %.4f eV.\n',Be);\n",
+"disp('Exa-11.1(b)');\n",
+"n=9;a=1.7476; R=0.281; k= 1.44;     //Given values and consstants\n",
+"Bc=k*a*(1-(1/n))/R;                  //ionic binding energy eperimentally\n",
+"printf('The calculated value of the binding energy is %.4f eV.',Bc);"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 11.2: Energy_per_neytral_atom_to_take_apart_a_crystal_of_Nacl.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"clear\n",
+"clc\n",
+"disp('Exa-11.2');\n",
+"a=3.61;// amount of energy required to remove an electron from Cl- ion\n",
+"b=-5.14 //amount of energy returned when an electron is added to Na+ ion\\n",
+"c=7.98 //binding energy of NaCl atom\n",
+"E=a+b+c  //suom of all the energies\n",
+"printf('The net energy to be supplied is %.3f eV',E);"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 11.3: Solution_for_a_and_b.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"clear\n",
+"clc\n",
+"disp('Ex-11.3(a)');\n",
+"Na=6.023*10^23; p=8.96*10^3; M=63.5*10^-3;   //Na=avagadro's number,p=density,M=molar mass\n",
+"n= p*Na/M;                                   //density of charge carriers\n",
+"printf('The density of charge carriers in copper is %e atoms/m3\n',n);\n",
+"s=5.88*10^7;m=9.11*10^-31;e=1.6*10^-19;    //charge & mass of an electron,resistance per unit length\n",
+"t= s*m/(n*e^2);                            //average time between collisions\n",
+"printf('The average time between collisions of conducting electrons is %e sec.\n',t);\n",
+"disp('Ex-11.3(b)');\n",
+"Ef=7.03*1.6*10^-19;           //converting given enrgy to J\n",
+"Vf=sqrt(2*Ef/m);               //fermi velocity\n",
+"l=Vf*t;                      //mean free path\n",
+"printf('The average mean free path is %e m = %.1f nm',l,l*10^9);"
+   ]
+   }
+],
+"metadata": {
+		  "kernelspec": {
+		   "display_name": "Scilab",
+		   "language": "scilab",
+		   "name": "scilab"
+		  },
+		  "language_info": {
+		   "file_extension": ".sce",
+		   "help_links": [
+			{
+			 "text": "MetaKernel Magics",
+			 "url": "https://github.com/calysto/metakernel/blob/master/metakernel/magics/README.md"
+			}
+		   ],
+		   "mimetype": "text/x-octave",
+		   "name": "scilab",
+		   "version": "0.7.1"
+		  }
+		 },
+		 "nbformat": 4,
+		 "nbformat_minor": 0
+}