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Chemistry > Molecular geometry > Flashcards

Molecular geometry Flashcards

1
Q

What is a bonding pair?

A

A pair formed between two atoms ( one electron from each atom)

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2
Q

What is a lone pair?

A

A lone pair is an unpaired pair of electrons.

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3
Q

What do we call a molecule which has 2 bonding pairs, and 0 lone pairs?

A

Name : Linear

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4
Q

What do we call a molecule which has 3 bonding pairs, and 0 lone pairs?

A

name : Trigonal planar

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5
Q

what do we call a molecule which has 4 bonding pairs, and 0 lone pairs?

A

name: tetrahedral

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6
Q

What do you call a molecule which has 2 bonding pairs, and one lone pair?

A

name: Bent - V - shape.

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7
Q

What do you call a molecule which has 3 bonding pairs, and one lone pair?

A

Name: trigonal pyramidal

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8
Q

What do you call a molecule with 2 bonding pairs, and 2 lone pairs?

A

name: bent

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9
Q

What do you call a molecule which has 5 bonding pairs, and 0 lone pairs?

A

name: trigonal bipyramidal

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10
Q

What do you call a molecule which has 4 bonding pairs, and 1 lone pair?

A

name: seesaw

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11
Q

What do you call a molecule which has 3 bonding pairs, and 2 lone pairs?

A

name : T - shaped.

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12
Q

What do you call a molecule with 6 bonding pairs, and 0 lone pairs?

A

name: octahedral

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13
Q

What do you call a molecule with 4 bonding pairs, and 2 lone pairs?

A

name: square planar

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14
Q

what is the main purpose of a bond?

A

To repel as further away as possible from all the other bonds.

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15
Q

put the following in order, from strongest repulsion to weakest repulsion: Lone pair - bond pair, Lone pair - lone pair, bond pair - bond pair.

A
  1. Lone pair - lone pair
  2. lone pair - bonding pair
  3. bonding pair - bonding pair.
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16
Q

why does the bond angle decrease, whenever we have a lone pair, instead of a bonding pair?

A

This is because lone pairs, repel more than bonding pairs. This means the distance between the bonding pairs will shorten, thus, decreasing the bond angle.

17
Q

what is the bond angle in a linear molecule

A

180 degrees.

18
Q

what is the bond angle in a trigonal planar?

A

120 degrees

19
Q

what is the bond angle in a tetrahedral molecule?

A

109.5

20
Q

what is the bond angle in a bent V shape (2 bonding pars, and one lone pair) molecule?

A

118 degrees

21
Q

what is the bond angle in a trigonal pyramidal molecule?

A

107 degrees.

22
Q

what is the bond angle in a bent (2 bonding pairs, and 2 lone pairs) molecule?

A

104.5 degrees.

23
Q

what is the bond angle in a trigonal bipyramidal?

A

120 degrees, and 90 degrees.

24
Q

what is the bond angle in a seesaw molecule?

A

between 100-119 degrees
and
between 85-89 degrees.

25
Q

what is the bond angle in a T-shaped molecule?

A

88 degrees.

26
Q

what is the bond angle in an octahedral molecule?

A

90 degrees.

27
Q

what is the bond angle in a square planer molecule?

A

90 degrees.

28
Q
A

Chemistry (21 decks)

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