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AS/A-Level Chemistry Edexcel > AS/A-Level Chemistry Edexcel- Shapes of Molecules > Flashcards

AS/A-Level Chemistry Edexcel- Shapes of Molecules Flashcards

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1
Q

What shape has 2 bonding pairs and no lone pairs?

A

Linear

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2
Q

What is the angle of a linear shape?

A

180

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3
Q

What is the shape with 4 bonding pairs and no lone pairs?

A

Tetrahedral

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4
Q

What is the angle of a tetrahedral shape?

A

109.5

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5
Q

What shape has 3 bonding pairs and no lone pairs?

A

Trigonal planar

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6
Q

What is the angle of a trigonal planar?

A

120

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7
Q

What shape has 5 bonding pairs and no lone pairs?

A

Trigonal bi pyramidal

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8
Q

What is the angle of a trigonal bipyramidal?

A

120 and 90

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9
Q

What shape has 6 bonding pairs and no lone pairs?

A

Octahedral

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10
Q

What is the angle of an octahedral?

A

90

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11
Q

What shape has 3 bonding pairs and 1 lone pair?

A

Trigonal pyramidal

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12
Q

What is the angle of a trigonal pyramidal?

A

107

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13
Q

What shape has 2 bonding pairs and 2 lone pairs?

A

V-shaped

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14
Q

What is the angle of a v-shaped molecule?

A

104.5

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15
Q

What is the EPR theory?

A

Electron pair repulsion theory states that:
-the shape of a molecule or ion is caused by the repulsion between the pairs of electrons, both bond pairs and lone pairs that surround the atom

  • the electron pairs arrange themselves around the central atom so that the repulsion between them is at a minimum
  • lone pair-lone pair> lone pair-bond pair>bond pair-bond pair
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16
Q

What shape has 4 bonding pairs and 1 lone pair?

A

Seesaw

17
Q

What shape has 5 bonding pairs and 1 lone pair?

A

Square pyramidal

18
Q

What angle does a square pyramidal have?

A

90

19
Q

What shape has 3 lone pairs and 3 bonding pairs?

A

T shaped

20
Q

What shape has 4 bonding pairs and 2 lone pairs?

A

Square Planar

21
Q

What is the relationship of the amount of lone pairs on angle size?

A

More lone pairs, smaller the angle as the repulsion brings them together. Repulsion reduces the size of the angle

AS/A-Level Chemistry Edexcel (5 decks)

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