Post on 24-Dec-2015
Do now! Can you
complete the sheet “Different
Properties” you started yesterday?
Today’s lesson
• Know how good metals and non-metals are at conducting heat and electricity
• Know which metals are magnetic
• Know some of the other properties of metals and non-metals
• Know that different metals have different uses because of their properties
Properties of Metals?
Properties of Metals
ALL metals are good conductors of heat and electricity
Electrons can easily move from atom to atom in the metal carrying energy
Properties of Metals
Non metals tend to be poor conductors of heat and electricity.
Their electrons are bound tightly.
with the exception of graphite (carbon)
Properties of Metals
Some metals are magnetic
Only iron (steel), cobalt and nickel
Properties of Metals
Metals generally have high melting points
With the exception of mercury and the alkali metals (Lithium, sodium, potassium….)
Tungsten melts at 3422 ºC
Properties of metals
Most metals are also malleable and ductile
Properties of metals
• Can you stick in a complete the sheet “Different properties”
Uses
Their properties dictate their uses
Gold
Unreactive, malleable and a good conductor of electricity
Jewelry, wires in computers, gold leaf
Aluminium
Light, and a very unreactive oxide layer forms over the reactive metal means it does not corrode
Aircraft, cars, cutlery etc.
Steel (mainly iron)
Strong, fairly cheap.
Building
Copper
Ductile, unreactive and a good conductor
Saucepans, wires etc.
Let’s go for a walk!
Looking for uses of metals
Homework
• Metal Can/packet/sachet/jar/box/CD case• Choose a metal• Put the following information about the metal on a
can/packet/sachet/jar/box- Name and chemical symbol (2 marks)- Where can it be found? (1 mark)- What does it look like? (2 marks)- Boiling point, melting point, density (3 marks)
• - The cost per kilogram of the metal (1 mark)• - At least three uses of the metal (3 marks)• - Any other interesting facts/properties you can find (3 marks)• - Make the can look real/attractive (5 marks)• Due Friday 11th September 2009