Pages in this set

Page 1

Preview of page 1
Chemistry Revision






Hazard Symbols

Page 2

Preview of page 2

States of Matter




As heat is added to a solid the particles start to vibrate more and more vigorously. Eventually when it
reaches its melting point the particles have enough energy to break their bonds and melt into a
liquid. As it is cooled energy is taken away so the…

Page 3

Preview of page 3

ELECTRONS
Held on energy levels
First level can only hold 2 electrons
After the first the rest of the energy levels can hold 8
Electrons heavily influence the chemical properties of an element
Electrolytes are substances that conduct electricity when molten or in solution (ionic)

ISOTOPES
An atom with the…

Page 4

Preview of page 4
Gas Tests:
Hydrogen ­ Lit splint gives a squeaky `pop'
Carbon Dioxide ­ Turns Limewater cloudy
Oxygen ­ Re-lights a glowing splint
Ammonia ­ Turns red litmus blue (Smells distinctively)
Chlorine ­ Green gas bleaches blue damp litmus

Water:
Anhydrous copper sulphate goes from white to blue
Cobalt Chloride goes…

Page 5

Preview of page 5
Hydrochloric Acid ­ Chloride
Sulphuric Acid ­ Sulphate
Nitric Acid ­ Nitrate
Phosphoric Acid ­ Phosphate

Acid + Metal = Salt + Hydrogen
Acid + Base = Salt + Water
Acid + Carbonate = Salt + Water + Carbon Dioxide

Strength of Acids ­ A strong acid totally dissociates to…

Page 6

Preview of page 6











Bonding
There are 3 types of bonding: ionic, covalent and metallic.

Ionic
An ionic bond is the electrostatic force of attraction that occurs between two ions.
It's strength depends on the charges on ions
High melting and boiling points
Soluble in water
Conduct electricity when in solution or molten
Between…

Page 7

Preview of page 7




Metallic
The electrostatic force of attraction between the lattice of ions and delocalised sea of
electrons.
Regular arrangement (lattice) of ions
Surrounded by a delocalised sea of electrons.
Conduct electricity and heat because of mobile electrons
Malleable because layers of ions can slide over each other
Between 2 or more…

Page 8

Preview of page 8
The number of outer electrons on the outer energy level is determined by what group the
element is in and therefore what its ion is. E.g Na = Na Mg = Mg²
The number of energy levels is determined by what period E.g Mg is in period 3 and its…

Page 9

Preview of page 9
Despite extra protons on elements lower down the group the further you go from the
nucleus with more energy levels it becomes harder to attract and extra electron.


Reactions of Halogens

Displacement ­ Due to it forming a reactivity series different Halogens will displace each other just as
metals do:…

Page 10

Preview of page 10
2. Determine the ratio between compounds and alter accordingly
3. Use this to figure out desired value

Empirical Formula Calculations

There are 4 steps to figuring out the empirical formula of any compound when you are given the
masses or percentage of the different elements within it:

1. Lay out…

Comments

iqrxo

Report

thanks(:

tom.belayneh

Report

If I were to literally revise the whole document would i be well prepared for the exam?


matina_212

Report

thanks a lot

very helpful

matina_212

Report

neat, colourful and nicely written. great for revision. what more would you want?

claudxx_p

Report

thankyou so much **

ratul.sarker5

Report

thanks for the support

lwood7

Report

Wow! These notes are amazing! Thanks! :) Is this for double or triple award?

Alaindr

Report

Good stuff!

matina_212

Report

i help my students revise with this thank u

mirandaferg

Report

amazing thank you

Chamelka

Report

how to open this ?

lwood7

Report

to open it - click the title in the grey box

nadialj

Report

Thank you so much. Amazing notes and info!

Jolobo

Report

i'm gonna fail chem

Daisyd1731

Report

Hi, is this a double or triple study guide

Similar Chemistry resources:

See all Chemistry resources »