Talk:Principal quantum number

message: Please define m0. is it m_e, the mass of electron ?  — Preceding unsigned comment added by Fabrice.Neyret (talk • contribs) 09:43, 14 March 2019 (UTC)
thread_title: m0 undefined

message: Aren't they the s, p, d and f orbitals? I'm confused. Jonathan Grynspan
s,p,d,f are for the orbital angular momentum (or azimuthal to give its ancient name) quantum number. 
I've put the vital word "average" in to qualify the distance of the electron from the nucleus - it is by no means fixed! --Ian 08:06, 30 Jan 2005 (UTC)
thread_title: Untitled

message: Why does radial quantum number redirect here? I have always been taught that the radial quantum number is: 
 n_r = n - l - 1 
Being equal to the number of nodes in the radial wavefunction. Does wikipedia call this something else? --Zapateria 17:16, 6 June 2006 (UTC)
thread_title:  Radial quantum number 

message: I'm having trouble with the following line: The energy of any wave is the frequency multiplied by Planck's constant. This causes the wave to display particle-like packets of energy called quanta.
There is no 'wave', nor any 'particle': there is just a quantum, namely the electron. We just visualize it as a wave or a particle, depending on the interaction it is undergoing, but it is neither! The fact that the electron has a certain energy does not cause it to do anything.
I know that the energy of an electromagnetic wave is equal to the frequency multiplied by Planck's constant. Does this hold for electrons? I vaguely seem to remember calculating the wavelength of a tennisball once... Even so, this just tells us the frequency from the (known) energy, it is not an explanation of quantization effects.
--GilHamiltonTheArm 14:21, 21 November 2006 (UTC)
thread_title:  wave/particle  

message: I have to do a small research for my course about Why was it named K,L,M,N,O.... , rather than A,B,C,D... , and i got quite lost while researching for it.  —Preceding unsigned comment added by SherifHagar (talk • contribs) 16:43, 25 February 2010 (UTC)
thread_title:  Why were the Orbit shells Named "K,L,M,N,O..."? 

message: The following is the current second sentence in the introductory first paragraph. "As n increases, the electronic shells becomes more and the electron spends more time farther from the nucleus."  Please fix. Thanks  — Preceding unsigned comment added by 97.125.81.247 (talk) 18:47, 19 January 2016 (UTC)
thread_title:  Need an expert in this field to supply whatever is apparently missing from this sentence. 

message: And, thanks so much for this article, clever helpful people who made it! Can we add complete definition of variables in Bohr's equation. So great to have this article! On a personal note, I'm note sure I've added a comment to this page in the right way...only just joined Wikipedia :)WikiStudent 23:34, 4 January 2020 (UTC)
thread_title:  Just a beginner trying to figure out how to notify of a small thing to add: 

message: It is called quantum numbers 119.152.51.8 (talk) 18:16, 26 July 2022 (UTC)
thread_title:  Principal quantum numbers give the number of main energy level 

message: The "Derivation" section says "The difference between energy levels that have different n determine the emission spectrum of the element".  Can emission lines not be generated by energy level changes with the same n, ie, within the same shell?  See for example the image in Principal series (spectroscopy), which shows a 3p-3d transition.  As I understand the notation, both states are in the same n=3 shell.
Certainly the difference between energy levels in different shells contributes to spectra, but that is not the sole source of spectra as this seems to suggest.  Either "determine" is an overstatement, or "different n" is too restrictive.  Perhaps "The difference between [available] energy levels determines the emission spectrum..."? Captain Puget (talk) 14:44, 2 May 2024 (UTC)
thread_title:  Source of emission spectrum of an element