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C2.6 Shapes of Molecules and Intermolecular Forces > 6.1 Shapes of molecules and ions > Flashcards

6.1 Shapes of molecules and ions Flashcards

1
Q

What is electron pair repulsion theory?

A

-Electron pairs repel as far as possible to produce the shape of a molecule
-Lone pairs repel more than bonding pairs, this can reduce bond angles

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2
Q

What does molecular shape depend on?

A

Electron pairs around the central atom

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3
Q

In what ways do electron pairs interact?

A

The repel each other as far as possible

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4
Q

What type of electron pair repel the most?

A

Lone pairs repel more than bonding pairs, reducing bond angles

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5
Q

What do dotted wedge, solid wedge and solid lines stand for?

A
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6
Q

Why does a lone pair repel more strongly than a bonded pair?

A

A lone pair of electrons is slightly closer to the central atom, and occupies more space than a bonded pair, resulting in lone pairs repelling more strongly

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7
Q

What is the order of pair repulsion, from strongest to weakest?

A

lone pair/lone pair
lone pair/bonding pair
bonding pair/bonding pair

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8
Q

What shape name is given to a molecule with no lone pairs but 4 bonded pairs?

A

Tetrahedral

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9
Q

What is the bond angle for a tetrahedral molecule?

A

109.5

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10
Q

What shape name is given to a molecule with 1 lone pairs and 3 bonded pairs?

A

Pyramidal

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11
Q

What is the bond angle in a pyramidal molecule?

A

107

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12
Q

What shape name is given to a molecule with 2 lone pairs and 2 bonded pairs?

A

Non-linear

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13
Q

What is an example of a tetrahedral molecule?

A
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14
Q

What is an example of a pyramidal molecule?

A
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15
Q

What is an example of a non-linear molecule

A
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16
Q

What shape name is given to a molecule with 0 lone pairs and 2 bonded pairs?

17
Q

What is the bond angle of a linear shape?

18
Q

What is an example of a linear molecule?

19
Q

What shape name is given to a molecule with 0 lone pairs and 3 bonded pairs?

A

Trigonal planar

20
Q

What is the bond angle in a trigonal planar molecule?

21
Q

What is an example of a trigonal planar molecule?

22
Q

What shape name is given to a molecule with 0 lone pairs and 5 bonded pairs?

A

Trigonal bipyramidal

23
Q

What is the bond angle in a trigonal bipyramidal molecule?

A

There are actually two, 120 in one plane and 90 in the other plane

24
Q

What shape name is given to a molecule with 0 lone pairs and 6 bonded pairs?

A

Octahedral

25
Q

What is the bond angle of a octahedral molecule?

26
Q

What happens to the bond angle as number of electron pairs increases?

A

Bond angle will decrease with more electron pairs

C2.6 Shapes of Molecules and Intermolecular Forces (4 decks)

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