1. Transition Metals
Transition Metals are found in the middle of the Periodic Table.
Transition Metal Compounds are coloured e.g. Copper Sulphate is BLUE. Chromium oxide is GREEN.
Transition Metals and their compounds are used as CATALYSTS.

2. Properties of Transition Metals.
Transition Metals are GOOD conductors of heat.
Transition Metals are GOOD conductors of electricity.
Transition Metals can be drawn into wires.
Transition Metals are malleable i.e. can be hammered into shape.

3. Structure of Metals + + + + - - - - - + + + + - - - - - + + + + - -

4. Atomic Structure of Metals
Metals are CRYSTALLINE.
Structure consists of a regular arrangement of atoms with a positive charge surrounded by a sea of electrons that are free to move.
These mobile electrons are called DELOCALISED electrons. + -

5. Explaining Properties of Metals.
Metals can be drawn into wires and hammered into shape because the layers of positive metal atoms can slip over one another without the structure breaking.
When heated the positive metal atoms start to VIBRATE more. The delocalised electrons collide these vibrating +atoms and gain energy and travel through the metal

6. Why Metals are good conductors of electricity.
When a voltage is applied across a metal with a battery there is a flow of electric current (flow of electrons) because the DELOCALISED ELECTRONS are able to move throughout the whole structure.
When heated less current is carried because the atoms get further apart and the delocalised electrons have further to move.