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Lewis Structures

Lewis Structures. This is also called the Electron Dot Structure. Look at the highest Energy Level of an atom. Add the number of electrons within that energy level (s and p orbitals). Lewis Structures. Arrange “dots” around the symbol of the atom to represent those electrons.

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Lewis Structures

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  1. Lewis Structures • This is also called the Electron Dot Structure. • Look at the highest Energy Level of an atom. • Add the number of electrons within that energy level (s and p orbitals).

  2. Lewis Structures • Arrange “dots” around the symbol of the atom to represent those electrons.

  3. Reasons for Electron Dot Structure • Represents Rule of Eight • Shows the number of electrons in highest energy level • Shows how element will react • Easier than Electron Configuration Notation

  4. Reasons for Electron Dot Structure • Used to show types of Molecular Bonding • Clearly represents Periodic Law

  5. Rule of Eight • The Rule of Eight states that an element can have no more than eight electrons in its highest energy level

  6. Rule of Eight • If we look at the Electron Configuration Notation of an element, we notice that the orbitals in the highest energy level only include the s and p orbitals which combined can only hold up to eight electrons.

  7. Rule of Eight and Electron Dot Structure • Applying the Rule of Eight dictates where the electrons (dots) are placed around the Symbol of the element we wish to represent. • Let’s use the generic symbol “Sy” to show the order and location of the dots.

  8. Represents the “p” orbital electrons Represents the “s” orbital electrons Rule of Eight and Electron Dot Structure 6 3 Sy 4 1 7 2 5 8

  9. Sy Electron Dot Structure • So, the Electron Dot Structure of an element with a full “s” and “p” orbital would look like:

  10. Highest energy level is 2 Electron Dot Structureof an element • Lithium = • if we add up the number of electrons in the highest energy level we get 1 • So the Electron Dot Structure of Lithium is: 1s2 2s1 Li

  11. Highest energy level is 3 Electron Dot Structureof an element • Sulfur = • if we add up the number of electrons in the highest energy level we get 2 + 4 = 6 1s2 2s2 2p6 3s2 3p4

  12. Electron Dot Structureof an element • So the Electron Dot Structure of Sulfur is: S

  13. Highest energy level is 4 Electron Dot Structureof an element • Vanadium = 1s2 2s2 2p6 3s2 3p6 4s2 3d3

  14. Electron Dot Structureof an element • if we add up the number of electrons in the highest energy level we get 2 electrons • So the Electron Dot Structure of Vanadium is: V

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