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{
"metadata": {
"name": ""
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter 4: Cohesion between atoms"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 4.1, page no-92"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# Coulomb interatomic energy\n",
"\n",
"import math\n",
"#Variable declaration\n",
"R=2.81*10**-10 # distance between oppositely charged ion\n",
"e=1.6*10**-19 # Charge of an electron\n",
"eps=8.854*10**-12 # epsilon\n",
"\n",
"#calculation\n",
"U=-(e**2)/(4*math.pi*eps*R)\n",
"\n",
"#Result\n",
"print('The Coulomb interatomic energy is %.2f eV'%(U*10**19/1.6))"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The Coulomb interatomic energy is -5.12 eV\n"
]
}
],
"prompt_number": 1
}
],
"metadata": {}
}
]
}
|
