Molecular Structure Lewis Diagrams.

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Presentation transcript:

Molecular Structure Lewis Diagrams

C. Polyatomic Ions To find total # of valence e-: Add 1e- for each negative charge. Subtract 1e- for each positive charge. Place brackets around the ion and label the charge.

O O Cl O C. Polyatomic Ions ClO4- 1 Cl × 7e- = 7e- 4 O × 6e- = 24e-

H H N H C. Polyatomic Ions NH4+ 1 N × 5e- = 5e- 4 H × 1e- = 4e- 9e-

D. Resonance Structures Molecules that can’t be correctly represented by a single Lewis diagram. Actual structure is an average of all the possibilities. Show possible structures separated by a double-headed arrow.

D. Resonance Structures O S O O O S O O O S O