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ZZZ AS level: Chemistry - > Bonding: Shapes of molecules > Flashcards

Bonding: Shapes of molecules Flashcards

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1
Q

what is the name of the theory which helps to predict the shapes of molecules?

A
  • electron pair repulsion theory

- valence shell electron pair repulsion theory

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2
Q

what two conclusions can we draw from this theory?

A
  • each pair of electrons around an atom will repel each other as far as possible
  • pair of electrons will take up positions as far apart as possible to minimise repulsion
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3
Q

what are the two types of electron pairs?

A
  • bonding pairs

- lone pairs

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4
Q

what is a bonding pair?

A

two shared electrons in a covalent bond

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5
Q

what is a lone pair?

A

a pair of electrons not involved in bonding

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6
Q

why do lone pairs repel more than bonding pairs?

A

because they are more compact

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7
Q

what is name of shape and bond degree when there are 2 bp?

A

linear - 180

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8
Q

what is name of shape and bond degree when there are 3bp?

A

trigonal planar - 120`

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9
Q

what is name of shape and bond degree when there are 2 bp and 1 lp?

A

bent - 118

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10
Q

what is name of shape and bond degree when there are 4 bp?

A

tetrahedral - 109.5

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11
Q

what is name of shape and bond degree when there are 3 bp and 1 lp?

A

trigonal pyramid - 107

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12
Q

what is name of shape and bond degree when there are 2 bp and 2 lp?

A

bent - 104.5

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13
Q

what is name of shape and bond degree when there are 5 bp ?

A

trigonal pyramid - 120/ 90

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14
Q

what is name of shape and bond degree when there are 4 bp and 1 lp?

A

see-saw - 119/89

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15
Q

what is name of shape and bond degree when there are 3 bp and 2 lp?

A

trigonal planar or T shape - 120 or 89

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16
Q

what is name of shape and bond degree when there are 6 bp?

A

octahedral - 90

17
Q

what is name of shape and bond degree when there are 5 bp and 1 lp?

A

distorted square pyramid - 89

18
Q

what is name of shape and bond degree when there are 4 bp and 2 lp?

A

square planar - 90

19
Q

what is the name of the shape when 2 bp and 0 lp?

A

linear

20
Q

what is the name of the shape when 2 bp and 1 lp?

A

bent

21
Q

what is the name of the shape when 2 bp and 2 lp?

A

bent

22
Q

what is the name of the shape when 3 bp and 0 lp?

A

trigonal planar

23
Q

what is the name of the shape when 3 bp and 1 lp?

A

trigonal pyramid

24
Q

what is the name of the shape when 3 bp and 2 lp?

A

trigonal planar or T-shape

25
Q

what is the name of the shape when 4 bp and 0 lp?

A

tetrahedral

26
Q

what is the name of the shape when 4 bp and 1 lp?

A

see-saw

27
Q

what is the name of the shape when 4 bp and 2 lp?

A

square planar

28
Q

what is the name of the shape when 5 bp and 0 lp?

A

trigonal pyramid

29
Q

what is the name of the shape when 5 bp and 1 lp?

A

distorted square pyramid

30
Q

what is the name of the shape when 6 bp and 0 lp?

A

octahedral

31
Q

what is the bond degree when there are 2bp and 0lp?

A

180

32
Q

what is the bond degree when there are 2bp and 1lp?

A

118

ZZZ AS level: Chemistry - (8 decks)

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