shapes

Question 1

2 bond pairs no lone pairs

Answer 1

linear
180°

Question 2

3 bond pairs no lone pairs

Answer 2

trigonal planar
120°

Question 3

4 bond pairs no lone pairs

Answer 3

tetrahedral
109.5

Question 4

5 bond pairs no lone pairs

Answer 4

trigonal bipyramidal
120° and 90°

Question 5

6 bond pairs no lone pairs

Answer 5

octahedral
90°

Question 6

3 bond pairs 1 lone pair

Answer 6

trigonal pyramidal
107°

Question 7

2 bond pairs 1 lone pair

Answer 7

bent
118°

Question 8

5 bond pairs 1 lone pair

Answer 8

square pyramid 89°

Question 9

2 bond pairs 2 lone pairs

Answer 9

v shaped
104.5°

Question 10

3 bond pairs 2 lone pairs

Answer 10

T shape
120° and 89°

Question 11

4 bond pairs 2 lone pairs

Answer 11

square planar
90°

Question 12

what is electron pair repulsion theory

Answer 12

the bonding pairs of electrons seperate out to maximise seperation and minimise repulsion

Question 13

define bond angle

Answer 13

the angle between two covalent bonds in a molecule or giant covalent structure

Question 14

what is the second part of valence shell electron pair repulsion theory

Answer 14

lone pairs of electrons are held more closely to the central atom and so exert a greater repelling effect than bonding pairs.

Question 15

define bond length

Answer 15

the distance between two nuclei of two atoms linked by one or more covalent bonds

Question 16

how to structure justifying shape questions

Answer 16

state shape and bond angle
state number of bonding pairs
state the number of lone pairs
bonding pairs sepeate out to maximise separation (minimise repulsion)
lp-lp repulsion > lp-bp > bp-bp