D. Crowley, 2007

 To be able to describe the properties of metals, and relate properties to their uses Wednesday, August 19, 2015

 Look at the different substances on the table - in small groups sort these into two groups  You need to explain why you put each object in each group…

 Hopefully you would have noticed a pattern to sort the two groups  Some of the objects are metals  Other are non-metals  Today we’re going to investigate the properties of metals and non- metals…

 In small groups you need to investigate the properties of metals and non- metals  First copy down the table best  Then conduct you experiments to find the properties of a metal and non- metal  E.g. you might find out that metals make a dull sound when you hit them (but you may not)!

 Test the properties… PropertyMetalsNon-metals State at room temperature Conduction of heat and electricity Flexibility (can shape it) Malleability (can bend it) Sound when hit Are they magnetic? Oxides are acids / bases Remember - a base (alkali) goes blue/purple; an acid goes yellow/red & neutral is green

 If you want to test to see if the substance conducts, set up a circuit as follows (the bulb will light if it conducts) Add you metal / non-metal to circuit via croc. clips Bulb will light, if it conducts! Cell for power  I will conduct a test for you to show you what happens when metals / non-metals react with oxygen to form acids / bases…

 Test the properties… PropertyMetalsNon-metals State at room temperature Conduction of heat and electricity Flexibility (can shape it) Malleability (can bend it) Sound when hit Are they magnetic? Oxides are acids / bases Remember - a base (alkali) goes blue/purple; an acid goes yellow/red & neutral is green Usually solids Good conductors Can be shaped Malleable (bend without breaking) Ringing noise Some are bases half gases; half solids Bad conductors Cannot be shaped Dull noise Not magnetic acids Brittle (break if you try and bend them)

 Most elements are metals rather than non-metals  Metals and non-metals have opposite properties to each other, e.g. conductivity  But be careful! There are always exceptions to the rule - e.g. carbon (non-metal) conducts!  Also, not all metals are magnetic (only iron, cobalt and nickel)  Not all metals are solid at room temp. (mercury is a liquid)

 Shiny  Solid at room temp.  Brittle  Conducts heat  Conducts electricity  Ringing sound  None are magnetic  Dull sound  Strong  Weak  Half solids, half gas (room temp.)  Good insulators  Dull looking Metal Metal (except mercury) Non-metal Metal Non-metal Metal Non-metal Non-metal (except carbon) Non-metal