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What are the properties used to identify a substance?
Colour, texture, hardness, lustre, solubility, conductivity, melting point, boiling point
What is sublimation?
Direct conversion of solid to gas without passing through liquid state. e.g. camphor, dry ice, naphthalene
Give an example of crystallisation.
Making sugar crystals from sugarcane juice or salt crystals from seawater
What is a chemical reaction?
A process in which reactants are transformed into products with different properties
What is a reactant?
A substance that takes part in and is altered in a chemical reaction
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