1) Strong, high density, GOOD conductors of electricity and heat,
shiny, hard, malleable, ductile, flexible
2a) i) mercury is unusual because most metals are solids.
ii) carbon is unusual as non-metals caNNOT conduct electricity.
Properties of Metals vs Non-metals
Types of Metals
Different metals could have the same
uses since they have common
properties…
BUT the decision to use which type
depends on many factors:
- Cost
- Appearance
- Abundance
etc…
Uses of Metals and WHYYY
Uses of Metals and WHYYY
Iron is strong and hard. Combined with carbon, iron is used to make steel.
Uses of Metals and WHYYY
Aluminium is light, malleable
and great conductors of heat.
Uses of Metals and WHYYY
Copper is ductile and a great conductor of electricity;
it is also unreactive and strong.
3a) copper is a great conductor of electricity.
b) iron reacts with water and rusts.
4) physical property is what a substance looks like or does WITHOUT reacting
while a chemical property is what a substance does in chemical reactions.
Chemical Properties of Metals
Metals also have common chemical properties:
- reacting with water
Metal + oxygen → metal oxide
- reacting with halogens
Metal + halogen → metal halide
Often form a single solid compound
Chemical Properties of Metals
Reactions are similar, but occur at different rates/speed
1.
2.
3.
4.
5.
6.
7.
8.
Sodium + Chlorine →
Potassium + Fluorine →
Lithium + Bromine →
Zinc + Chlorine →
Copper + Fluorine →
Magnesium + Chlorine →
Silver + oxygen →
Iron + oxygen →
Catalysts
Catalyst: a substance that increases the rate of a chemical reaction WITHOUT
undergoing any permanent chemical change itself
de
Zinc + sulfuric acid → zinc sulfate + hydrogen
Zinc + hydrochloric acid → zinc chloride +
hydrogen
1.
2.
3.
4.
Iron + sulfuric acid →
Magnesium + sulfuric acid →
Zinc + hydrochloric acid →
Aluminium + hydrochloric acid →
Catalysts
Platinum, Palladium, Rhuthenium and Silver are used as catalyst…
Platinum works as a catalyst by collecting oxygen atoms (O), and letting them bind with
the toxic carbon monoxide (CO), creating the less harmful carbon dioxide (CO2).
6a) a substance that speeds up chemical
reaction without being used up
b) because they are very expensive
7) platinum catalyst is used in car exhausts
to speed up the reaction that changes
harmful gases to harmless gases. They are
also used in hair curlers, speeding up the
reaction that releases heat