Prove the Point

Solids - particles tightly held together, fixed positions, vibrate to and fro

Liquids - particles close together but can move, don't keep definite shape, particles move past each other

Gases - particles are far apart and whizz about a lot, weak forces of attractions between the particles, move quickly in all directions.

Diffusion is just particles speading out.

Diffusion is particles moving from area of high concentration to low concentration.

C - Carbon

Na - sodium

Cl - clorine

K - pottasium

Fe - iron

H - hydrogen

O - oxygen

Mg - magnesium

S - Sulphur

Cu - copper

1) CO2 - 3

2) H2SO4 - 7

3) C6H12O6 - 24

copper+sulphur

copper sulphide  CuS

colour change, bubbles, precipitation

melting

freezing

boiling

condensing

sublimiing (rare)

dissolving

evaporating

A chemical change produces a new substance, while a physical change does not.

A physical change nothing is lost and nothing is gained, but it changes the arrangement of the particles (solid, liquid, gas) and their energy (how much they move)

Hydrocloric acid+lithium hydroxide--> salt+lithium cloride+water

Magnisium oxide

Magnisium carbonade

5

Fuel + oxygen -->  carbon dioxide + water vapour

If CO2 is bubbled through lime water it reacts with the calcium hydroxide to produce calcium carbonate.

copper sulphate

Combustion

1.05