Bohr's model of an atom stated that electrons move in fixed orbitals and that each orbit has a fixed energy. As per NCERT, ‘it was based on the postulate that only certain special orbits known ...

All of the negative charge was held in the electrons, which must orbit the dense nucleus like planets around the sun. In 1912 Bohr joined Rutherford. He realized that Rutherford's model wasn't ...