6.1 Shapes Of Molecules

Question 1

How does the electron-pair repulsion theory explain molecular shapes?

Answer 1

Electron Pairs surround central atom.

They repeal each other so are positioned as far apart as possible.

This arrangement minimises repulsion, holding atoms in defined shape.

Question 2

LINEAR

Electron pairs?
Bonded pairs?
Lone pairs?
Angle?

Answer 2

2 electron pairs

2 bonded pairs

0 lone pairs

180 degrees

Question 3

TRIGONAL PLANAR

Electron pairs?
Bonded pairs?
Lone pairs?
Angle?

Answer 3

3 electron pairs

3 bond pairs

0 lone pairs

120 degrees

Question 4

TETRAHEDRAL

Electron pairs?
Bonded pairs?
Lone pairs?
Angle?

Answer 4

4 electron pairs

4 bond pairs

0 lone pairs

109.5 degrees

Question 5

TRIGONAL BIPYRAMIDAL

Electron pairs?
Bonded pairs?
Lone pairs?
Angle?

Answer 5

5 electrons pairs

5 bond pairs

0 lone pairs

120 degrees, 90 degrees

Question 6

OCTAHEDRAL

Electron pairs?
Bonded pairs?
Lone pairs?
Angle?

Answer 6

6 electron pairs

6 bonded pairs

0 lone pairs

90 degrees

Question 7

NON LINEAR

Electron pairs?
Bonded pairs?
Lone pairs?
Angle?

Answer 7

4 electron pairs

2 bond pairs

2 lone pairs

104.5 degrees

Question 8

PYRAMIDAL

Electron pairs?
Bonded pairs?
Lone pairs?
Angle?

Answer 8

4 electron pairs

3 bond pairs

1 lone pair

107 degrees

Question 9

SQUARE PLANAR

Electron pairs?
Bonded pairs?
Lone pairs?
Angle?

Answer 9

6 electron pairs

4 bond pairs

2 lone pairs

90 degrees