Bohr model

In atomic physics, the Bohr model depicts the atom as a small, positively charged nucleus surrounded by electrons in orbit - similar in structure to the solar system. Because of its simplicity, the Bohr model is still commonly taught to introduce students to quantum mechanics.

Shortcomings of the Bohr model

The Bohr model gives an incorrect value mathbf{L} = hbar for the ground state orbital angular momentum , but the actual value is 0.

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It also fails to explain:

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• the spectra of larger atoms: it could at best approximately predict what atoms with one outer electron would do for spectral emissions
• the relative intensities of spectral lines
• the existence of hyperfine spectral lines
• the Zeeman effect - changes in spectral lines due to external magnetic fields