![]() ![]() Bohr proposed several changes to that model: electrons can only travel in special orbits at a certain set of distances from the nucleus with specific energies, electrons do not continuously lose energy as they travel. The drawback to the theory was that based on his theory, electrons would be emitting(losing) their charge and spiral into the nucleus, making all atoms unstable. Rutherford proposed that electrons orbited the nucleus much like a planet around the Sun. The Bohr model built on the Rutherford theory. At some time in the future this model of the atom may be proven to be too rigid in its scope. ![]() Once students are advanced enough in their comprehension, they are introduced to the more accurate valence shell atom. ![]() Although considered to be obsolete, it is still taught as an introduction to quantum mechanics and in early secondary school science classes. The Bohr model was an improvement on older atomic models, but it too has been rendered obsolete by ongoing scientific research. It is, basically, a modification of the Rutherford model used for quantum physics purposes. The model’s key success was in explaining the Rydberg formula for the spectral emission lines of atomic hydrogen. This model of the atom depicts a small, positively charged nucleus surrounded by electrons that travel in circular orbits around the nucleus much like the planets travel around the Sun, but the electrostatic forces product attraction instead of gravity. Bohr’s model was first introduced in 1913. The most widely accepted atom model is that of Niels Bohr. ![]()
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