Ion Circular
What are the essential points of Bohr’s theory of the structure of the hydrogen atom?
Electrons have elliptical orbits.
An electron may move from one orbit to another by absorbing or emitting a photo of light with the exact correct energy content.
Each orbit of the atom has a specific energy level.
Each orbit of the atom corresponds to a specific number of electrons that are fixed at that energy level.
Electrons have circular orbits.
Ions are able to accept and give off electrons by having an even number in their outer valence shell.
(1) is important, but not essential. The eccentricity of the orbit corresponds to the azimuthal quantum number. If your instructor didn’t tell you that, how could it be an essential point?
(2) is also true of the classical model. Nothing particularly Bohring about it.
(3) is also true of the classical model. In fact it is tautological – Moliere would be pleased.
(4) is nonsense. No one ever suggested such a thing.
(5) is important, but not essential. A circular orbit corresponds to an azimuthal quantum number of zero (see (1) above)
(6) is nonsense. You don’t believe that atoms with odd atomic numbers are only permitted odd oxidation numbers, and atoms with even atomic numbers are only permitted even oxidation numbers, do you? (Please say ‘no’.)
The essential points of Bohr’s atom are that
(a) only particular orbits with specific (“quantized”) orbital energies are permitted,
(b) energy is only absorbed or radiated by electronic transitions between these orbits; the time-varying electric field created by the negatively charged electron orbiting the positively charged nucleus doesn’t radiate energy like a radio antenna, as you’d expect from classical theory
Eric Streuli Demos the Bosch GKS 18v Li Circular Saw
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