Electron Dot Diagrams (Lewis Dot)

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Presentation transcript:

Electron Dot Diagrams (Lewis Dot) Quick way to show bonding electrons (valence) Use the atomic symbol to represent the nucleus and inner shell electrons. Valence electrons ONLY are shown as dots around the symbol. Arrange the dots around in a clockwise way, ending with electrons in pairs.

S Ca F Al Sulfur atom: 16 p+ 16 e- (6 valence e-) Calcium atom: 20 p+ Aluminum atom: 13 p+ 13 e- (3 valence e-) Fluorine atom: 9 p+ 9 e- (7 valence e-) F Al

O Li Li Li O Oxygen atom: Lithium atom: 8 p+ 3 p+ 8 e- (6 valence e-) -2 + Li O Lithium oxide 2

Potassium combines with chlorine K Cl - + K Cl Potassium chloride

2. Sodium combines with nitrogen Na N Na Na + -3 Na N sodium nitride 3

3. Lead (II) combines with sulfur Pb S +2 -2 Pb S lead (II) sulfide

Ca +2 S -2 Ca S formula unit Ionic Compound