Peat
Bituminous
Lignite
Anthracite
An anion
A cation
A molecule
An atom
It exists as a solid, a liquid or a gas
It contains hydrogen and oxygen
It contains two different elements joined by chemical bonds
It cannot be split up into simpler substances by chemical means
Potassium
Caesium
Sodium
Lithium
Any metal and mercury
Any non-metal and lead
Any metal an fluorine
Any non-metal and chlorine
Calcium sulphate
Calcium carbonate
Calcium oxide
Calcium chloride
Oil has unsaturated fats
Oil has saturated fats
To store the oil is convenient
Oil is cheeper
Teflon
Lucite
Polystyrene
Poly vinyl chloride
Combination with atmospheric
Hydration leading to another hydrate
Oxidation with atmospheric oxygen
Dehydration
5
6
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