Chemistry

Chemistry

1. Periodic Table

   • He discovered 63 elements
     • right side of periodic table: Metals/Left side of periodic table: Non-metals
     • He also discovered two groups, 'the reactive non-metals&reactive metals'
   • Row=Period/Column=Group
   • Mendley

2. He arranged the periodic table in atomic weights in columns.

3. Structure of an atom

   • neutrons
     • You find the protons&neutrons in the middle of a nucleus
   • Protons
   • Electrons
     • You fin the electrons on the outer side of the atom
   • Subordinate Particle
     • Relative Mass
       • \Relative Charge
       • 1
         • +1
         • 1
           • 0
             • -1
           • 1/1840
     • Proton
     • Neutron
     • Electron
       • Same number