1 / 22

Quantum Numbers and Electronic Configuration

Quantum Numbers and Electronic Configuration.

fagan
Download Presentation

Quantum Numbers and Electronic Configuration

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Quantum Numbers and Electronic Configuration

  2. 1927, Brussels From left to right: [first row] (1) I. Langmuir, (2) M. Planck, (3) M. Curie, (4) H.A. Lorentz, (5) A. Einstein, (6) P. Langevin, (7) C.E. Guye, (8) C.T.R. Wilson, (9) O.W. Richardson[second row] (1) P. Debye, (2) M. Knudsen, (3) W.L. Bragg, (4) H.A. Kramers, (5) P.A.M. Dirac, (6) A.H. Compton, (7) L.V. de Broglie, (8) M. Born, (9) N. Bohr[third row] (1) A. Piccard, (2) E. Henriot, (3) P. Ehrenfest, (4) E. Herzen, (5) Th. de Donder, (6) E. Schroedinger, (7) E. Verschaffelt, (8) W. Pauli, (9) W. Heisenberg, (10) R.H. Fowler, (11) L. Brillouin.

  3. Heisenberg’s Uncertainty Principle(1901-1976) • The principle states that it is impossible to know the exact position and velocity of an electron.

  4. How do I know how the electrons are distributed around Si ?

  5. How do I know how the electrons are distributed around Si ?

  6. QUANTUM NUMBERS • The shape, size, and energy of each orbital is a function of 4 quantum numbers which describe the location of an electron within an atom or ion(PROBABILITY ) n ---> energy level l ---> sublevel ,shape of orbital ml ---> designates the rotation of the orbital s ---> spin of the electron (clockwise or counterclockwise:

  7. 1. Principal Quantum Number • Designates the energy level or shell( house) n = 1,2,3,4,5,6,7,......

  8. 2. Angular Momentum Quantum Number(l) • Designates the sub level where the electron can be found.Shape of orbitals(REGION IN SPACE) where the electrons can be found.( apartment) s-orbital, l = 0 p-orbital, l = 1 d-orbital, l = 2 f-orbital, l = 3

  9. 3.Magnetic Quantum Number (ml) • Designates the orbital where the electron can be found. • Ml = -l, ....o,....+ l

  10. 4. Spin quantum number(s) Describes the spin of the electron.( + ½ , - ½ ), spin up and spin down.

  11. Practice

  12. Electron Configuration Electron configuration is a shorthand notation for describing the arrangement of the electrons about the nucleus. General format using the quantum numbers: n l e- n = principle quantum number l = orbital quantum number e- = number of electrons

  13. Hydrogen: 1s 1

  14. Examples Electronic Configuration: C 1s22s22p2 2, 4 Si How do we know how many electrons are in each level?

  15. Electronic Configuration simulation http://chemmovies.unl.edu/ChemAnime/ECONFIG/ECONFIG.html

  16. Periodic Table and electronic configuration

More Related