Molecular Geometry Flashcards

1
Q

determine molecular geometry: basic steps

A

determine the steric number

determine the geometry based on the number of bonds and lone pairs

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2
Q

steric number

A

the number of “electron dense areas” around a central atom

lone pairs or bonds (whether single, double, or triple)

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3
Q

molecular geometry: steric # 2, no lone pairs

A

linear

180° bond angle

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4
Q

molecular geometry: steric # 3, no lone pairs

A

trigonal planar

120° bond angle

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5
Q

molecular geometry: steric # 3, 1 lone pair

A

bent

<180° bond angle

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6
Q

molecular geometry: steric # 4, no lone pairs

A

tetrahedral

109.5° bond angle

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7
Q

molecular geometry: steric # 4, 1 lone pair

A

trigonal pyramidal

109.5° bond angle

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8
Q

molecular geometry: steric # 4, 2 lone pairs

A

bent

<109.5° bond angle

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9
Q

ideal bond angle: linear electron pair geometry

A

180 degrees

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10
Q

ideal bond angle: trigonal planar electron pair geometry

A

120 degrees

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11
Q

ideal bond angle: trigonal planar electron pair geometry

A

120 degrees

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12
Q

ideal bond angle: tetrahedral electron pair geometry

A

109.5 degrees

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