Timeline for Are atoms really round?
Current License: CC BY-SA 3.0
22 events
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| Jun 11, 2020 at 10:20 | history | edited | CommunityBot |
Commonmark migration
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| S Jan 31, 2017 at 21:15 | history | edited | Linear Christmas | CC BY-SA 3.0 |
Such a wonderful answer deserves prettier orbital nomenclature :) I added it (+ some grammar, and orbitals back to upright)
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| S Jan 31, 2017 at 21:15 | history | suggested | schneiderfelipe | CC BY-SA 3.0 |
Such a wonderful answer deserves prettier orbital nomenclature :) I added it
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| Jan 31, 2017 at 20:48 | review | Suggested edits | |||
| S Jan 31, 2017 at 21:15 | |||||
| Dec 3, 2014 at 16:29 | comment | added | Nicolau Saker Neto | @DavePhD Interesting remark. After a little thinking and with the great help of a previous answer, it would seem my original thoughts were incorrect. Without any disturbance, all atoms have spherically symmetric electron shells a priori regardless of how filled their subshells are. Thank you for the heads up. | |
| Dec 3, 2014 at 16:15 | comment | added | DavePhD | @NicolauSakerNeto why is it limited to half filled or filled? For a free atom, say hydrogen in a 2p state, is the electron in a particular p orbital or a superposition of all three p orbitals? | |
| Apr 2, 2014 at 2:02 | comment | added | dmckee --- ex-moderator kitten | @NicolauSakerNeto I think that is correct, at least for atoms whose nuclei do not exhibit a strong magnetic moment. Not sure if it can be guaranteed if the nuclear moment is significant. | |
| Apr 2, 2014 at 0:09 | comment | added | Nicolau Saker Neto | @dmckee Indeed that is true, because the electron density outside of the selected cutoff for drawing the orbitals also need to be taken into account. But just to be sure, I understand that half-filled subshells are also spherically symmetric? Thus any atom with a $s^1/s^2/p^3/p^6/d^5/d^{10}/f^7/f^{14}/...$ valence configuration (assuming all other non-valence subshells are fully populated) would be spherically symmetric. | |
| S Apr 1, 2014 at 19:48 | history | suggested | Ben | CC BY-SA 3.0 |
Reworded headers in order to clarify meaning and remove the need for awkward apostrophes
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| Apr 1, 2014 at 19:46 | review | Suggested edits | |||
| S Apr 1, 2014 at 19:48 | |||||
| Mar 29, 2014 at 4:21 | comment | added | dmckee --- ex-moderator kitten | All full shells of isolated atoms are spherically symmetric. And, yes, this is not obvious from the visualization images you have selected, but it is clear in the math. | |
| Mar 29, 2014 at 0:56 | comment | added | leftaroundabout | (Though you're right in a sense: in the absence of strong magnetic field the spin states are degenerate, so in the classical / statistical limit they're averaged out to spherical symmetry) | |
| Mar 29, 2014 at 0:49 | comment | added | leftaroundabout | Everything has a wave-particle duality, including atoms and even large molecules (only, normally thermal motion causes decoherence on scales smaller than their own size, so we don't really perceive quantum effects much except in very complicated cryogenic experiments). — BTW, spherical symmetry has little to do with particle vs. wave, it's a property fully describable in the exact Hilbert-space formulation. Fermions actually don't have a spherical symmetry but a strange two-rotations symmetry that has no classical correspondence. | |
| Mar 28, 2014 at 15:36 | comment | added | G M | @WayneWerner absolutely! We can describe very well some quantic phenomena and do some accurate prediction, but we are really far from a true understand of matter! Sometimes science give us the illusion of true Knowledge but in fact it give us only instruments for controls matter! | |
| Mar 28, 2014 at 15:31 | history | edited | G M | CC BY-SA 3.0 |
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| Mar 28, 2014 at 15:28 | comment | added | Wayne Werner | Man... particles are weird. Would it be safe to say that really we don't actually know what makes up "stuff" (i.e. matter) - we just have really good evidence of how it behaves in different conditions? | |
| Mar 28, 2014 at 15:22 | history | edited | G M | CC BY-SA 3.0 |
added 775 characters in body
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| Mar 28, 2014 at 15:12 | history | edited | G M | CC BY-SA 3.0 |
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| Mar 28, 2014 at 15:00 | vote | accept | Wayne Werner | ||
| Mar 28, 2014 at 14:52 | history | edited | G M | CC BY-SA 3.0 |
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| Mar 28, 2014 at 14:50 | comment | added | Wayne Werner | Same thing for neutrons? | |
| Mar 28, 2014 at 14:39 | history | answered | G M | CC BY-SA 3.0 |