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Unit 3 : - Coggle Diagram

- - - - PERIODIC TABLE
        
        METALS
        
        NONMETALS
        
        METALLOIDS/NOBLE GASES
  - - - MOLECULAR COMPOUNDS
      - IONIC COMPOUNDS/ACIDS/BASES
        
        FORMULAS
        
        BOND TYPES
        
        MOLECULAR MASSES
  - - - HOMOGENEOUS OR HETEROGENEOUS
- - - - Water
      - Salt
      - Sugar
    - - Metals
      - Non-metals
  - - - Homogeneous
        
        air
        
        seawater
      - Heterogeneous
        
        soil
        
        salad
- - - - Molecule is a subtopic of electrons, as it refers to a group of atoms bonded together by shared electrons.
        
        Element is a subtopic of molecule, as it refers to a pure substance composed of only one type of atom.
        
        Symbol is a subtopic of element, as it refers to the abbreviation used to represent an element in the periodic table.
- - - - CHEMICAL REACTIONS
        
        MASS OF REACTANTS = MASS OF PRODUCTS
  - - - NUCLEAR REACTIONS
        
        ENERGY OF REACTANTS = ENERGY OF PRODUCTS
- - - - ALKALI
        
        KOH, Ca(OH)2, NH3, SOAP AND DETERGENTS, NaOH,
        
        pH value greater than 7
        
        has a bitter taste, is slippery, and acts as a proton acceptor.
      - ACID
        
        HNO3, H2SO4, ACID RAIN, HCl,
        
        pH value less than 7
        
        has a sour taste, is corrosive, and acts as a proton donor.
      - NUTRALISATION
        
        acid + base → salt + water
        
        HCl + NaOH → NaCl + H2O
- - - - OXIDATION
        
        POSITIVE IONS
    - - REDUCTION
        
        NEGATIVE IONS OR HYDROGEN GAS