Atom

Atom

1. 1808 John Dalton Atomic Theory based

   • All matter is made up of minute particles called atoms

2. William Crookes (Cathode Rays)

   • Electric current is passed through glass tube also seen to fluoresce
   • Struck by some form of Radiation
   • Radiation was being emitted from the cathode because a shadow of the Maltese Cross

3. J.J. Thomson

   • cathode rays consisted of negatively- charged particles HE CALLED ELECTRONS
   • small hole in the positive electrode pass between two parallel
   • Plum pudding