Understanding De Broeglie Wavelength & Electron Orbits

  • Context: Graduate 
  • Thread starter Thread starter Shark 774
  • Start date Start date
  • Tags Tags
    Wavelength
Click For Summary

Discussion Overview

The discussion revolves around the concept of de Broglie wavelength in relation to electron orbits within an atom. Participants explore the implications of electron stability, the historical context of atomic models, and the behavior of electrons in response to changes in nuclear charge. The scope includes theoretical considerations and conceptual clarifications regarding quantum mechanics and atomic structure.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant questions whether electrons can temporarily exist in orbits that are not integer multiples of their de Broglie wavelength before decaying to stable orbits.
  • Another participant explains the historical context of the Bohr model, noting its limitations and the transition to Schrödinger's theory, which describes electrons as a probability cloud rather than fixed orbits.
  • A later reply suggests that changes in nuclear charge can lead to electrons occupying unallowed orbits, potentially falling below the lowest allowed orbit and requiring energy to move upward.

Areas of Agreement / Disagreement

Participants express differing views on the nature of electron orbits, with some supporting the classical interpretation of orbits and others advocating for a quantum mechanical perspective. The discussion remains unresolved regarding the possibility of temporary orbits and the implications of nuclear charge changes.

Contextual Notes

Limitations include the dependence on classical versus quantum mechanical interpretations of atomic structure and the unresolved nature of electron behavior in non-allowed orbits.

Shark 774
Messages
42
Reaction score
0
Electrons orbits are only allowed when a stable standing wave is formed around the nucleus, i.e. when the orbit circumference is an integer multiple of the electron's de broeglie wavelength. But is it possibly for it to temporarily exist in an orbit that is NOT an integer multiple of its wavelength and then VERY quickly decay to a stable orbit, or does it this just completely impossible?

(Note: I am only at a high school physics level)

Thanks!
 
Physics news on Phys.org
Shark, The idea that electrons in atoms travel in orbits about the nucleus was an early step before anyone understood how different quantum mechanics was. All that was known at that time was that only certain values of the energy were permitted. The Bohr model of the atom tried to explain this by picturing the atom as a miniature solar system, pretty much obeying classical mechanics except that the electron was required to be at values of the radius determined by the deBroglie wavelength. The Bohr model was a partial success in that it explained the energy levels, but failed on many of the details.

It was soon replaced by the Schrödinger theory, which roughly pictures an atomic level as an electron cloud. The electron does not go zipping around and around t he nucleus, and is not required to stay at a single radius, but has a probability spread over a range, which may even include r = 0.
 
Cool thanks! That really blows my year 12 understanding out of the water.
 
if the nucleus loses or gains a charge all orbiting electrons will be in unallowed orbits.

some may even be below the lowest allowed orbit and will have to move upward (radiating energy as they do)
 

Similar threads

  • · Replies 36 ·
2
Replies
36
Views
8K
  • · Replies 18 ·
Replies
18
Views
2K
  • · Replies 9 ·
Replies
9
Views
2K
  • · Replies 7 ·
Replies
7
Views
3K
  • · Replies 4 ·
Replies
4
Views
3K
  • · Replies 10 ·
Replies
10
Views
2K
  • · Replies 10 ·
Replies
10
Views
2K
  • · Replies 8 ·
Replies
8
Views
5K
  • · Replies 7 ·
Replies
7
Views
2K
  • · Replies 6 ·
Replies
6
Views
2K