timeline of atom

timeline of atom

1. Rhutherford

   • Bohr
     • 1913
       • showed electrons orbiting the neucleus
         • began the modern image
     • Chadewick
       • 1932
         • discoverd the nutron
   • 1909
     • first to use nucleus
       • started diagram we know today

2. Democritis

   • Dalton
     • Mendeelev
       • Thompson
         • 1897
           • discoverd protons
             • Worked out charges
               • plum pudding atom model
       • 1889
         • started periodic table
           • sorted the 63 known elements in
     • 1803
       • more scientific
         • Thought there was no limit to smallness
   • 400bc
     • first thought of atomus
       • building box of the univerese