When one substance chemically

changes into at least two

different substances when heated.

Alias Calcuium Carbonate. Made

by bubbling limewater in carbon

dioxide.

Alias Calcium Oxide. Made by

strongly burning limestone

which makes calcium oxide

and carbon dioxide.

Alias Calcium Hydroxide. Made

by slaking quicklime with water

to make slakelime (putty or

dry hydrate).

Alias Calcium Hydroxide Solution.

Made by adding a lot of water.

When atoms form chemical bonds

they react to form compounds.

Only electrons are involved.

When electrons are removed

or added to create to compound.

When metals and non-metals react,

metal lose positive electrons to

from positive ions, non-metals

lose gain electrons to form negative

bonds. Strongly attracted.

When non-metal atoms react,

they have enough electrons to

their outer shell because they

share electrons with the reacting

molecule. 

Show the atoms at the start

(reactant atoms) and those

at the end (product atoms).

Small; contains Protons and

Neutrons; overall positive charge.

Move round the nucleus;

negatively charged;

occupy shells; tiny.

An atom that has charge due

to protons or electrons being

added or removed.

Elements in agroup have same

number or electrons in their

outer shell.

A rock which contains enough

metal to make it worthwhile

extracting the metal from it.

(In many cases the metal is an oxide).

When an ore is reduced, carbon

is removed from it (e.g Iron Oxide

+ Carbon -- Iron + Carbon Dioxide).

A liquid used to conduct electricity

in electrolysis.

If you add a reactive metal to

a disolved compound, the more

reactive metal will replace the

less reacive metal.

The same but slightly different.

They're stong and bendy and

great conductors of heat and electricity.

Metals corrode when they're

exposed to air and water.

They lose their strength and hardness.

Good conductor of electricty;

hard and strong, but can be bent;

doesn't react with water to corrode.

Corrosion-resistant; low density

(light); isn't particularily strong

but forms hard, strong alloys.

Low-density material;

very strong;

corrosion-resistant.

When metals get tired because

of excessive stress and strain.

Used to mae ornamental buildings.

Contains 96% pure iron, other 4%

is impurities such as carbon.

Made by adding small amounts

of carbon and sometimes other

metals to the iron.

0.1% carbon. Easily shaped

and used for car bodies.

1.5% carbon. Very hard, inflexible

and used for the blades in cutting

tools, bridges.

Corrosion-resistant and used for

cutlery and containers for corrosive

substances.

Important in industry. Made from

two metals or a metal and no-metal.

Designed for specific use.

Made from copper and tin. Good for

making medals and statues from.

Made from copper and nickel.

Used to make "silver" coins.