Classification of Matter

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1. Pure Substances
   1. Elements
      1. Metals
      2. Non-metals
      3. Metalloid
   2. Compounds
      1. Organic
         1. Carbohydrates
         2. Nucleic acids
         3. Protein
         4. Lipids
      2. Inorganic
         1. Acids
         2. Bases
         3. Neutral
2. Mixtures
   1. Homogeneous
      1. Solution
   2. Heterogeneous
      1. Colloid
      2. Suspension