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Neils Bohr

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Ian Florang

on 18 September 2013

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Transcript of Neils Bohr

Neils Bohr
Bohr-n in Copenhagen, Denmark in 1885. Died in 1962.
In 1913 Niels Henrik Bohr published his new theory of the atoms constitution. Just like Rutherford he assumed that electrons circulate around the nucleus. But had the three completely new ideas:
1.There are some orbits that he called the stationery ones, where the moving electrons don't emit energy.
2.Each emission or absorption of radiation energy represents the electron transition from the one stationery orbit to the another. The radiation emitted during such transition homogeneous and its frequency is given by the formula hv = E1-E2, where h is the Planck constant, E1 and E2 are the energies in the two stationary states of the system.
3.The laws of mechanics describe the dynamic equilibrium of the electrons in stationery states but do not describe the situation of the electron transition from the one stationery orbit to the another.
People think that electrons would lose energy when revolving around the nucleus. However, Bohr said the electrons are at set levels of energy, or set distances from the nucleus. If it absorbed energy from an outside force, it would orbit further away from the nucleus, and if it radiated energy, it would move into a level closer to the nucleus.
Did People Accept His Ideas?
When Bohr first came out with his ideas, they weren't fully accepted. But, as more physicists researched work similar to his, they found that he was being proved correct time and time again.
Using Plank's constant, Bohr was able to create a new model of the atom that was different than any that had existed before. He believed that his employer's model was incorrect. The atom would collapse on itself very quickly.
The energies that he discovered also lead to the explanation of the hydrogen atom spectrum: the colors that are visible when light passes through hydrogen.
...is awesome. _
By Ian Florang,
Vlad Latushko and
Jonathan Moy
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