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Orbital Filling and Electron Dot Diagrams

Learn about orbital filling diagrams and electron dot diagrams, including the rules for filling orbitals and determining valence electrons. Practice drawing electron dot diagrams for various elements.

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Orbital Filling and Electron Dot Diagrams

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  1. Chapter 5 Orbital Filling Diagrams and Electron Dot Diagrams

  2. Orbital Filling Diagrams • Orbital filling diagrams illustrate the pairing of the electrons in an atom.

  3. An “s” sublevel has one orbital

  4. A “p” sublevel has three orbitals

  5. A “d” sublevel has five orbitals

  6. An “f” sublevel has seven orbitals

  7. Orbital Filling Diagrams

  8. A. General Rules • Pauli Exclusion Principle • Each orbital can hold TWO electrons with opposite spins.

  9. A. General Rules • Hund’s Rule • Within a sublevel, place one e- per orbital before pairing them. • All electrons in singly filled orbitals have the same direction of spin. RIGHT WRONG

  10. 2s 2p 1s B. Notation • Orbital Diagram O 8e- • Electron Configuration 1s2 2s22p4

  11. What type of sublevel is this?

  12. Make the orbital filling diagram for d8 How many of the electrons are unpaired?

  13. What type of sublevel is this?

  14. Make the orbital filling diagram for f10 How many of the electrons are paired?

  15. Electron Dot Diagrams Step 1: Write the electron configuration

  16. Electron Dot Diagrams Step 2: Determine the number of valence electrons. The valence electrons are the electrons in the outer energy level.

  17. Electron Dot Diagrams Step 3: Write the symbol of the element surrounded by valence electrons. Place one electron on each side before pairing them up.

  18. Draw the electron dot diagram for oxygen.

  19. Draw the electron dot diagram for selenium. (Z = 34)

  20. Draw the electron dot diagram for chlorine. (Z = 17)

  21. Draw the electron dot diagram for hydrogen. (Z = 1)

  22. Preview: Lewis Structures • Lewis structures will not be part of this chapter test but they illustrate a common use of electron dot diagrams.

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