Niels bohr In 1913 Bohr published a theory about the structure of the atom, by combining Planck's idea of quantized energy and rutherford's model of atom. Bohr proposed that electrons travel only in certain stationary orbits. He suggested that the outer orbits could hold more electrons than the inner ones and that these outer orbits determine the atom' s chemical properties. Bohr also described the way atoms emit radiation by suggesting that when an electron jumps from an outer orbit to an inner one, it emits light Niels bohr 1885-1962Niels Bohr Niels Bohr 1885 - 1962 In 1913 Bohr published a theory about the structure of the atom, by combining Planck’s idea of quantized energy and Rutherford's model of atom. Bohr proposed that electrons travel only in certain stationary orbits. He suggested that the outer orbits could hold more electrons than the inner ones, and that these outer orbits determine the atom's chemical properties. Bohr also described the way atoms emit radiation by suggesting that when an electron jumps from an outer orbit to an inner one, it emits light