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Flashcards in Shapes of molecules Deck (36):
1

How do you calculate the shape of a molecule?

1. what is the central atom
2. which group on the periodic table is it in?
3. how many bonds does it make?
4. does it have any electrons/charge?
5. bonds + e-
6. divide by 2
7. ans = number of e- pairs

2

2 bond pairs
(no lone pairs)

bong angle = 180°
shape = linear

3

3 bond pairs
(no lone pairs)

120°
trigonal planar

4

4 bond pairs
(no lone pairs)

109.5°
tetrahedral

5

5 bond pairs
(no lone pairs)

120° & 90°
trigonal bipyramid

6

6 bond pairs
(no lone pairs)

90°
octahedral

7

linear
(no lone pairs)

2 bond pairs
180°

8

trigonal planar
(no lone pairs)

3 bond pairs
120°

9

tetrahedral
(no lone pairs)

4 bond pairs
109.5°

10

trigonal bipyramid
(no lone pairs)

5 bond pairs
120° & 90°

11

octahedral
(no lone pairs)

6 bond pairs
90°

12

for each lone pair you subtract (....) from the bond angle

2.5°

13

2 bond pairs
1 lone pair

118°
bent OR non linear

14

3 bond pairs
1 lone pair

107°
trigonal pyramid

15

2 bond pairs
2 lone pairs

104.5°
bent OR non linear

16

4 bond pairs
1 lone pair

119° & 89°

17

3 bond pairs
2 lone pairs

120° OR 89°
trigonal planar OR T-shape

18

5 bond pairs
1 lone pair

89°
square pyramid

19

4 bond pairs
2 lone pairs

90°
square planar

20

lone pairs have a (........) repulsive power than bond pairs

greater

21

lone pairs affect the bond angles by....

pushing the bonding pairs away

22

lone pair - lone pair is the (most/least/in between) repulsive

most

23

lone pair - bonding pair is the (most/least/in between) repulsive

in between

24

bonding pair - bonding pair is the (most/least/in between) repulsive

least

25

180°

linear
2 bond pairs

26

120°

trigonal planar
3 bond pairs

27

109.5°

tetrahedral
4 bond pairs

28

120° & 90°

trigonal bipyramid
5 bond pairs

29

90°
(no lone pairs)

octahedral
6 bond pairs

30

118°

bent OR non linear
2 bond pairs, 1 lone pair

31

107°

trigonal pyramid
3 bond pairs, 1 lone pair

32

104.5°

bent OR non linear
2 bond pairs, 2 lone pairs

33

89° & 119°

4 bond pairs, 1 lone pair

34

120° OR 89°

trigonal planar OR T-shape
3 bond pairs, 2 lone pairs

35

89°

square pyramid
5 bond pairs, 1 lone pair

36

90°

square planar
4 bond pairs, 2 lone pairs