Summary Edexcel GCSE Chemistry Topic 2 - States of Matter and Mixtures

States of Matter and Mixtures

Elements – a substance with only one type of atom

Mixtures – Elements, molecules, compounds not chemically bonded

Compounds – Elements, molecules, compounds chemically bonded

A pure element or compound contains only one substance. Impure materials
are a mixture of elements and compounds.
Pure substances have a sharply defined melting point
Impure substances have a temperature range over which they melt


Solute – substance that has dissolved in a liquid to make a solution

Solution – formed when a substance has dissolved in a liquid

Insoluble – substance that cannot be dissolved in a certain liquid

Residue – material remaining in the filter after mixture has passed through it

Filtrate – solution passing through a filter

Solvent – the liquid in which a solute dissolve in to make a solution


Element Compound Mixture

Na H2O Air
C HCL Milk
K Al2O3 Salty water
H2 Ch4
Fe CO2
Li H2SO4
Al
N
O2

, Chromatograph