Physical and Chemical Changes-e-Notes


• Introduction, Chemical substance, Elements, Compounds, Mixtures, Chemical symbols
• Significance of a symbol, Chemical formulae
  - Chemical formulae of elements, Chemical formula of a compound, Significance of a chemical formula
• Chemical reactions
• Writing a chemical equation, Advantages of chemical equations
• Change
• Physical changes, Chemical changes
  - Reddish-brown deposition on iron objects, Browning of vegetable and fruit slices, Reaction between vinegar and baking soda
  - Reaction between copper sulphate solution and iron filings
• Crystallization - Table salt