The Rutherford-Bohr model provided the first really useful view of the atom. It matched what scientist knew about chemical reactions and the way atoms behaved. It led to some predictions that were later proven correct. Bohr had corrected a serious flaw by recognizing that electrons had to be in orbits (energy states). But his analysis of the energy given off when an electron dropped from a higher energy orbit to a lower energy orbit didn't hold up for atoms bigger than hydrogen (the simplest atom, with only one proton and no neutrons) More work needed to be done on the model.