Discovery of Atom

• Atom


  • Mostly made up of empty space
  • Mass and charge are concentrated in the centre
• Discovery of the atom

  1. Dalton - Atoms are invisible spheres

  2. Thompson - Atoms have electrons embedded in a positive charge

  3. Rutherford - Atoms have a dense, positively charged nucleus surrounded by electrons

  4. Bohr - Electrons orbit the nucleus in specific shells

  5. Chadwick - Atoms have neutrons in the nucleus