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//Chapter 1: Structure and Bonding
//Problem: 17
clc;
//Declaration of Constants
m = 9.1 * 10 ** -31 // Mass of electron, kg
h = 6.626 * 10 ** -34 // Plank's constant, J.sec
c = 3 * 10 ** 8 // Speed of light, m/sec
// Variables
v = 6.46 * 10 ** 5 // Velocity of electron, m/sec
lamda = 200 * 10 ** -9 // Wavelength of light, m
// Solution
E = (h * c) / lamda
ke = m * v ** 2
w = E - ke
mprintf("The Workfunction of the metal surface is %.3e J",w)
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