// Scilab code Exa1.8 : : Page 53 (2011) clc; clear; a = 17.78e-03; // First doublet mass difference, u b = 72.97e-03; // Second doublet mass difference, u c = 87.33e-03; // Third doublet mass difference, u M_H = 1+1/32*(4*a+5*b-2*c); // Mass of the hydrogen,amu printf("\nMass of the hydrogen: %8.6f amu",M_H); // Result // Mass of the hydrogen: 1.008166 amu