Shapes of simple molecules and ions Flashcards
1
Q
What pairs repel each other?
A
Bonding pairs and lone pairs
2
Q
How are atoms arranged in outer shell?
A
Arrange themselves as far apart as possible to minimise repulsion
3
Q
This is called?
A
Electron pair repulsion theory
4
Q
What type of repulsion is greatest?
A
Lone pair-lone pair repulsion is greater than lone pair-bond pair repulsion and bond pair-bond pair repulsion
5
Q
2 pairs of electrons
A
- linear
- 180’ apart
- Berylium Chloride
6
Q
3 pairs of electrons
A
- trigonal planar
- 120’ apart
- Boron Trifluoride
7
Q
4 pairs of electrons
A
- tetrahedral
- 109.5’ apart
- Methane
8
Q
5 pairs of electrons
A
- trigonal bipyramid
- Phosphorus pentachloride
9
Q
6 pairs of electrons
A
- octahedral
- 90’ apart
- sulfur hexafluoride
