Distances of electrons in the shell

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SUMMARY

The discussion centers on the distances of electron shells relative to the nucleus of an atom, emphasizing the importance of the Bohr radius. Marlon highlights that the average distance of any shell can be calculated using the formula r=n²ħ²/mZ'e², where Z' is the effective atomic number (Z' = Z - N). The conversation also underscores the limitations of the Bohr model in quantum mechanics, particularly regarding the uncertainty principle, which challenges classical physics interpretations of electron behavior.

PREREQUISITES
  • Understanding of quantum mechanics principles, particularly the uncertainty principle.
  • Familiarity with the Bohr model of the atom and its limitations.
  • Knowledge of atomic structure, including concepts like atomic number and electron shells.
  • Basic proficiency in physics equations and constants, such as ħ (reduced Planck's constant) and ε₀ (vacuum permittivity).
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  • Research the Bohr radius and its significance in atomic physics.
  • Explore quantum mechanics and the implications of the uncertainty principle on electron behavior.
  • Study the derivation and applications of the formula r=n²ħ²/mZ'e² in atomic physics.
  • Investigate advanced atomic models beyond the Bohr model, such as quantum mechanical models and electron cloud theory.
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Students and professionals in physics, particularly those studying atomic structure and quantum mechanics, as well as educators seeking to deepen their understanding of electron shell distances and their calculations.

dansphere
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Hi people,
I'm wandering what the distances of the levels of the electron shell are relative to the centre of the atom. I was told there's a pattern and am investigating it.
Regards,
Dan
 
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dansphere said:
Hi people,
I'm wandering what the distances of the levels of the electron shell are relative to the centre of the atom. I was told there's a pattern and am investigating it.
Regards,
Dan

Go check the concept of Bohr radius. Just one thing : in the reference, they are not talking about any atom but a very specific one :wink:

Keep in mind that you need to look at these results using the correct "eye". In QM, you have this little thing called the uncertainty principle that does NOT allow for you to be talking in terms of the orbit, distnace, velocity of a particle like you do in classical physics ! Also, beware of the fact that the Bohr Orbit model is NOT the complete picture. Check out our FAQ in the General Physics subforum for more indept info.

regards
marlon


marlon
 
The average distance of any shell from the nucleus is roughly given by
r=n^2 hbar^2/mZ'e^2, where Z' is an effective Z, given by
Z'=Z-N, where N is the number of electrons in lower closed shells.
If you want SI, multiply by fourpiepsilonzero.
 

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