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- Newsgroups: sci.electronics
- Path: sparky!uunet!nih-csl.dcrt.nih.gov!helix.nih.gov!arm
- From: arm@helix.nih.gov (Andrew Mitz)
- Subject: Re: electron orbitals
- Message-ID: <1992Oct10.213835.7397@alw.nih.gov>
- Followup-To: sci.electronics
- Keywords: physics, chemistry, headache
- Sender: arm@helix.nih.gov
- Organization: National Institutes of Health, Bethesda
- References: <Bvw0qr.5qu@cmptrc.lonestar.org>
- Date: Sat, 10 Oct 1992 21:38:35 GMT
- Lines: 43
-
- In article <Bvw0qr.5qu@cmptrc.lonestar.org> neal@cmptrc.lonestar.org (Neal Howard) writes:
- >In article <718623068.5@mailbox.bison.mb> Jason.Goga@mailbox.bison.mb.ca (Jason Goga) writes:
- >>I was in chem class the other day (as usual) and we were discussing the various
- >>shapes of orbitals at the various energy levels of electrons. Now we discussed
- >>S, P, D, and F. However no 3d picture of an 'F' orbital was given. I was wonder
- >>ing if such a plot exists and if so can I get a copy.
- >>
- >>ALSO, the S orbital is symetrical, so is the P. However in 3dx2 there is this '
- >>dougnut' shaped orbital, whereas it's counterparts are ovalish. Why is this?
- >>
- >>-Jason
- >
- >I don't have the specific answer to the shape of the "d" orbitals, but I can
- >tell you that it has something to do with Scroedinger's Equation (the oe is
- >really an "o" with an umlaut over the top) and the square of the wave function
- >which is included four times within the equation. The value represented by the
- >square of the wave function is related to the probability of finding an electron
- >in some certain region in space around the nucleus of the atom (actually the
- >electron density in that region). The "shape" of an orbital, or "boundary
- >surface" is only a diagram of the areas where the electron density is highest
- >according to about a 90 percent probability. The actual shape of the orbitals
- >may actually be different, the shapes we see in our textbooks are only those
- >areas corresponding to probability functions. I can see I'm fast getting out
- >of my area of familiarity on this topic and suggest you might want to post
- >to sci.physics for better explanations on why these probability functions are
-
- Just to make things worse (I am outside of my expertise, for sure), it is my
- understanding that the same equations have different solutions. The chemists
- choose one set of solutions because that produces some nice shapes that are
- easy to visualize mentally. There are other "shapes" that offer equally-
- good solutions to the same system of equations. Now, will someone who really
- knows this stuff straighten us out, please?
-
-
-
- -------------------------------------------------
- Andrew Mitz | NIH Animal Center
- Biomedical Engineer | Poolesville, MD
- -------------------------------------------------
-
- All opinions expressed are my own.
-
-
-