- Created by: Graziano Pelle
- Created on: 11-05-20 17:26
Draw diagrams of the particles in solids, liquids
Changes in motion and arrangement of particles
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.
Describe diffusion using the particle model.
Diffusion is just particles speading out.
Diffusion is particles moving from area of high concentration to low concentration.
Naming elements from symbols
C - Carbon
Na - sodium
Cl - clorine
K - pottasium
Fe - iron
H - hydrogen
O - oxygen
Mg - magnesium
S - Sulphur
Cu - copper
State how many atoms are in each of these compound
1) CO2 - 3
2) H2SO4 - 7
3) C6H12O6 - 24
Name the compound formed in this reaction
copper sulphide CuS
Give 2 signs that a chemical reaction has taken pl
colour change, bubbles, precipitation
Give an example of a physical change
Explain the difference between chemical and physic
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)
Write the word equation
Hydrocloric acid+lithium hydroxide--> salt+lithium cloride+water
Name this compound: MgO
Name this compound: MgCO3
State the mass of calcium
complete the equation Fuel + oxygen -->
Fuel + oxygen --> carbon dioxide + water vapour
What happens to Ca(OH)2 when CO2 is bubbled
If CO2 is bubbled through lime water it reacts with the calcium hydroxide to produce calcium carbonate.
What do we use to test for the presence of water?
What name do we give for the burning of a fuel in
Calculate the mean of these numbers: 0.9, 1.3, 1.2