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- Thread starter kay
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- #2

mfb

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Here is a hint: other atoms have more than one electron. Is this taken into account in the Bohr model?

- #3

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But another doubt, can Bohr's model explain the spectrum of species isoelectronic to Hydrogen?

- #4

mfb

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It does not work well for heavy atoms due to relativistic effects and the size of their nuclei.

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Relativistic effects? :/

- #6

jtbell

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I don't know what is relativistic or anything. Sorry. I can't understand anything. :(

- #8

jtbell

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Sorry, I thought you had at least seen a derivation of the Bohr orbit radii, which includes the orbital speed along the way. If you haven't, try the Wikipedia article on the Bohr model. It has enough information that you should be able to get the electron speed in orbit "n" with only a little bit of algebra.

The boundary between "non-relativistic" and "relativistic" is not sharp, but a common rule of thumb is that if a speed is greater than 0.1c, you really should be using relativistic equations.

The boundary between "non-relativistic" and "relativistic" is not sharp, but a common rule of thumb is that if a speed is greater than 0.1c, you really should be using relativistic equations.

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- #9

mfb

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They do not, but Bohr's orbits have a speed.I don't even know orbitals had speed.

If that speed gets comparable to the speed of light ("c"), the formulas from classical mechanics (like kinetic energy = ##\frac{1}{2}m v^2##) get imprecise to outright wrong and you have to consider special relativity.

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