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Periodic Table (Important people who worked on the PT (Mendelev,…

- - - - Group 1: One electron unstable
  - - - PT - Top to bottom element gets bigger
        
        Hydrogen - smallest
        
        Francium - largest
        
        Top to bottom - energy need decreases
        
        Electronegativity
        
        The ability to attract other electrons
        
        1 more item...