1. The problem statement, all variables and given/known data At the bottom of this linked-to screen below is an equation for E = - .......... = - ............. = - 13.6 Z^2 / n^2 eV https://en.wikipedia.org/wiki/Bohr_model#Electron_energy_levels 2. Relevant equations I'm using the following values for the formula Z=1 n=1 K sub e = 8.987 x 10^9 (Coulombs constant) e = 2.71828 m sub e = 9.11 x 10^-31 (mass of electron) h-bar = 1.05 x 10^-34 3. The attempt at a solution But when I plug these values in I get (4.017x10^-9) / (2.205 x 10^-68) = - 1.82 x 10^59 and not -13.6 eV What am I doing wrong? Are any of my values above incorrect?