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IMAT > VSEPR theory > Flashcards

VSEPR theory Flashcards

1
Q

What does VSEPR stand for?

A

Valence Shell Electron Pair Repulsion.

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2
Q

What is the main idea behind VSEPR theory?

A

VSEPR theory predicts the geometry of molecules based on the repulsion between electron pairs around a central atom.

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3
Q

According to VSEPR theory, how do electron pairs arrange themselves around a central atom?

A

Electron pairs arrange themselves as far apart as possible to minimize repulsion.

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4
Q

What is the molecular geometry of a molecule with 2 bonding pairs and no lone pairs?

A

Linear.

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5
Q

What is the molecular geometry of a molecule with 3 bonding pairs and no lone pairs?

A

Trigonal planar.

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6
Q

What is the molecular geometry of a molecule with 4 bonding pairs and no lone pairs?

A

Tetrahedral.

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7
Q

What is the molecular geometry of a molecule with 3 bonding pairs and 1 lone pair?

A

Trigonal pyramidal.

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8
Q

What is the molecular geometry of a molecule with 2 bonding pairs and 2 lone pairs?

A

Bent or angular.

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9
Q

What is the molecular geometry of a molecule with 5 bonding pairs and no lone pairs?

A

Trigonal bipyramidal.

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10
Q

What is the molecular geometry of a molecule with 6 bonding pairs and no lone pairs?

A

Octahedral.

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11
Q

What is the bond angle in a linear molecule?

A

180 degrees.

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12
Q

What is the bond angle in a trigonal planar molecule?

A

120 degrees.

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13
Q

What is the bond angle in a tetrahedral molecule?

A

109.5 degrees.

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14
Q

What is the bond angle in a trigonal bipyramidal molecule?

A

90 degrees and 120 degrees.

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15
Q

What is the bond angle in an octahedral molecule?

A

90 degrees.

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16
Q

How does the presence of lone pairs affect the bond angles in a molecule?

A

Lone pairs take up more space than bonding pairs, causing bond angles to decrease.

17
Q

What is the molecular geometry of a molecule with 2 bonding pairs and 1 lone pair?

A

Bent or angular.

18
Q

What is the electron geometry of a molecule with 4 bonding pairs and no lone pairs?

A

Tetrahedral.

19
Q

What is the difference between electron geometry and molecular geometry?

A

Electron geometry considers all electron pairs (bonding and lone pairs), while molecular geometry considers only bonding pairs.

20
Q

What is the shape of a molecule with 4 bonding pairs and 2 lone pairs?

A

Square planar.

IMAT (32 decks)

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