D. Crowley, 2007

To be able to describe the properties of metals, and relate properties to their uses

Wednesday, April 19, 2023

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…

Property Metals Non-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…

Property Metals Non-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

MetalMetal (except mercury)Non-metalMetalMetalMetalNon-metalNon-metalMetalNon-metalNon-metalNon-metal (except carbon)Non-metal