// Scilab code Exa6.5: : Page-242(2011)
clc; clear;
M_Na = -8420.40;        // Mass of sodium 24, keV
M_Mg = -13933.567;      // Mass of magnesium 24, keV
E = (M_Na-M_Mg)/1000;    // Energy of the electron, MeV
printf("\nThe maximum energy available to the electrons in the beta decay = %5.3f MeV", E);

// Result
// The maximum energy available to the electrons in the beta decay = 5.513 MeV