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Electron Configurations for the modern model of the atom

Learn about electron orbitals, Heisenberg Uncertainty Principle, Bohr and Modern models of the atom, orbital diagrams, and energy levels. Discover how electrons fill in atoms with the help of an illustrative summary.

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Electron Configurations for the modern model of the atom

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  1. Electron Configurations for the modern model of the atom

  2. Orbitals • are the region of most probable location of electrons in an atom • Heisenberg Uncertainty Principle • Impossible to know exact location and momentum of any electron in an atom.

  3. The orbitals in the atom correspond to the blocks of the periodic table

  4. S orbitalspherical fits 2 electrons

  5. P orbitalsdumbbells fit 2 electrons each

  6. D orbitalsClover Leaf fit 2 electrons each

  7. F orbitals

  8. Draw Magnesium Bohr Model of Atom Modern Model (Quantum) 12n 12p 12n 12p Not so easy to draw so we revert to the Bohr model

  9. . . . . and figure out its electron configuration How to fill an orbital diagram

  10. 3p 3s 2p 2s 1s Empty orbital diagram Showing energy of electrons in their orbitals least energy at the bottom to the most going up

  11. e- represented with arrows • e- occupy lowest E levels first • e- will occupy separate orbitals if possible • e- in the same orbital must have opposite spins

  12. 3p 3s 2p 2s 1s H 1s1

  13. H

  14. 3p 3s 2p 2s 1s He 1s2

  15. He

  16. 3p 3s 2p 2s 1s Li 1s22s1

  17. Li

  18. 3p 3s 2p 2s 1s Be 1s22s2

  19. 3p 3s 2p 2s 1s B 1s22s22p1

  20. B

  21. 3p 3s 2p 2s 1s C 1s22s22p2

  22. 3p 3s 2p 2s 1s N 1s22s22p3

  23. 3p 3s 2p 2s 1s O 1s22s22p4

  24. 4p 3d 4s 2p 3p 2s 3s 1s K 1s22s22p63s23p64s1

  25. K

  26. 4p 3d 4s 2p 3p 2s 3s 1s Ca 1s22s22p63s23p64s2

  27. 4p 3d 4s 2p 3p 2s 3s 1s Sc 1s22s22p63s23p64s23d1

  28. Sc

  29. Electron summary • s can hold 2 electrons • p can hold a total of 6 electrons • 2 in each orbital • d can hold a total of 10 electrons • 2 in each orbital

  30. So how many electrons in each energy level? • E level 1 = 2 e- • E level 2 = 8 e- • E level 3 = 18 e- • E level 4 = 32 e- But NEVER more than 8 valence e- because of the order the e- fill!

  31. The End

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