Bonding Shapes

Question 1

2 bonding pairs

Answer 1

Linear
180

Question 2

3 bonding pairs

Answer 2

Trigonal planar
120

Question 3

4 bonding pairs

Answer 3

Tetrahedral
109.5

Question 4

5 bonding pairs

Answer 4

Trigonal bypyrimidal
90 and 120

Question 5

6 bonding pairs

Answer 5

Octahedral
90

Question 6

2 bonding pairs one lone pair

Answer 6

V - shape
117.5

Question 7

3 bonding pairs 1 lone pair

Answer 7

Trigonal bypirimidal
107

Question 8

4 bonding pairs 1 lone pair

Answer 8

See saw
89 and 119

Question 9

5 bonding pairs and 1 lone pair

Answer 9

Square byprimid
89

Question 10

2 bonding pairs 2 lone pairs

Answer 10

V - shape
104.5

Question 11

3 bonding pairs 2 lone pairs

Answer 11

Trigonal planar
115

Question 12

4 bonding pairs 2 lone pairs

Answer 12

Square planar
90

Question 13

Difference in angle between bonding pairs and lone pair

Answer 13

2.5

Question 14

What repel

Answer 14

Bonding pairs repel more than lone pairs as far apart as possible

Question 15

3 things to look for in molecules

Answer 15

Type of bonding and type of intermolecular force

Question 16

3 types of bonding

Answer 16

Ionic
Covelant ( simple molecular and macromolecular which is S c SiO2 )
Metallic

Question 17

3 types of intermolecular forces

Answer 17

1 . Hydrogen between ONF with H
2. Permanent ( lone pairs )
3. induced ( increased in molecule size increase in elections so stronger induced dipole )

Question 18

Electronegativity

Answer 18

The ability for an atom to attract a pair of electrons in a covelant bond
Fluorine has most electronegativity so look for molecules closest to F
Talk about polarity
Eg Cl more polar then C

Question 19

How induced dipole forces arise

Answer 19

Random arrangent of electrons which leads to
Uneven distribution of electrons which leads to
Temporary dipole in one molecule but this
Induces a dipole in another molecule which is oppositely charged
Dipoles attract as opposite charges

Question 20

How permanent dipole forces arise

Answer 20

Difference in Electronegativity which leads to bond polarity
Dipoles don’t cancel out so therefore an overall dipole occurs which an attraction between delta + and delta - of an molecule

Question 21

Key points when drawing hydrogen bonding

Answer 21

1. Make sure everything is in a straight line
2. Make sure lone pairs are on O (2)
3. Make sure partial charges are labelled
4. Make sure hydrogen bonding dashed line is labelled