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Representing Atoms Visually

Lewis dot diagrams, also known as Lewis structures, are a visual representation of atoms and their bonding in compounds. Learn how to draw Lewis structures by determining the number of valence electrons and placing dots around the element symbol. Practice with examples of calcium, lithium, nitrogen, argon, and boron. Complete a worksheet for classwork or homework.

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Representing Atoms Visually

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  1. Representing Atoms Visually Lewis Dot Diagrams (Dot Diagrams; Lewis Structures)

  2. Lewis Structures • One type of visual representation of an atom • Helpful for determining bonding in compounds • There is one thing you need to know for Lewis Structures: # valence electrons

  3. 1 Valence Electron 2 Valence Electron 3 Valence Electron 4 Valence Electron 5 Valence Electron 6 Valence Electron 7 Valence Electron 8 Valence Electron

  4. How do I draw a Lewis Structure? • Draw the symbol for the element • Figure out the number of valence electrons for the element using the periodic table • Draw the correct number of dots around the element symbol • Draw one dot on each of the four sides before putting a second dot on each side.

  5. Example of a Lewis Structure Neon is in Group 8 therefore it has 8 valence electrons surrounding it. This is represented by the dots.

  6. Lewis Structures - Practice • Calcium (Ca) • Lithium (Li) • Nitrogen (N) • Argon (Ar) • Boron (B)

  7. Classwork/Homework • Complete your worksheet Lewis Dot Structures • Due: W 10/26/11

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