Assuming, with Bohr, that quantized values of L are Similarly spaced, the spacing between neighboring energies is The outermost electron in lithium orbits at approximately the Bohr radius, Because the two internal electrons reduce the nuclear charge by 2. This outer electron should be at nearly one Bohr radius from http://umtsflatvergleich.de/die-vorteile-der-verwendung-einer-hebebuhne-in-ihrem-trainingsprogramm/