Answering Shapes of molecules questions

1. Draw a lewis diagram.
2. Mention the number of electron clouds around the central atom and what shape in space this relates to.
3. Mention the number of bonded groups on the central atom and the number of nonbonding electrons on the central atom.
4. Link this information to the molecules shape.

Example
AsF3 is trigonal pyramid Shape
Repulsion of four charge clouds around As: three of which are bonding with one nonbonding pair of electrons. This leads to a trigonal pyramid shape

AsF5 is trigonal bipyramid Shape
Repulsion of 5 charge clouds around As: all of which are bonding leads to a trigonal bipyramidal shape