The periodic table revision

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  • The periodic table
    • Water
      • sources
        • Rivers
        • Lakes
        • Resevoires
      • Purification
        • Filtration
        • sedimentation
        • Chlorination
      • Testing
        • Chlorine forms a white precipitate
        • Bromide forms a cream precipitate.
        • Iodide forms a yellow precipitate.
    • Ionic bonding
      • metal combines with non metal
        • Transfer electrons
      • ions
        • positive when loses electron
        • Negative when gains electon
      • High melting point=strong attraction
    • Covalent bonds
      • Non metals combine by sharing electrons.
      • Overlapping brackets
    • Reactivity
      • Group 1
        • Flame test
          • Lithium=red
          • sodium= yellow
          • Potassium=  lilac
      • Group 7
        • Reactivity decreases
          • Melting point increases
          • Boiling point increases
    • Transition elecments
      • Thermal decomposition
      • Copper compounds=blue
      • Iron II green
      • Iron III orange
        • Iron II green

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