[SOLVED] speed of electrons 1. The problem statement, all variables and given/known data In the Bohr model of the hydrogen atom, an electron circles a proton at a radius of 5.3e-11 m. How fast must the electron be moving if the centripetal acceleration is to be supplied by Coulombic attraction? 2. Relevant equations L=n(h/2pi) where h is plancks constant and n is an integer L=rmv 3. The attempt at a solution n(h/2pi)=rmv v=n(h/2pi)/(rm) v= n(6.63e-34/2pi)/(5.3e-4)(9.11e-31) v= 0.218n m/s Now that velocity seems way to small for a speed of an electron.... Any help is appreciated! Thanks!