The periodic Table

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  • The Periodic Table
    • John Newlands
      • Law of Octaves
        • Repeating properties
        • Increasing atomic mass
        • Inconsistent
    • Dmitri Mendeleev
      • Modern layout
        • Increasing atomic number
      • Left gaps for unknown elements
    • Groups
      • Elements with similar chemical properties
      • Vertical columns
      • Alkali metals - Group 1
        • Increase in reactivity as you go down
      • Halogens - Group 7
        • Diatomic molecules
        • Decrease in activity as you go down
      • Noble gases - Group 0
    • Periods
      • Similar properties repeated
      • Horizontal rows
    • Elements
      • Metals
      • Non-metals
      • Metalloids

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