mind map

mind map

1. dalton

   • was a pioneer of atomic theory
   • elements were the smallest particles called atoms
   • 1986
   • 1900's
   • most natural materials are mixtures of pure substances.

2. thompson developed one of the first mathematical models of the atom

3. rutherford discovered the atomic nucleus

   • most particles passed through so atoms are mostly empty.

4. rutherford

   • 1911
   • he discovered the atom when shining alpha particle through a sheet of gold
   • 1900's

5. Thompson

   • 1897
   • he created the spectrometer to discover electrons.
   • 1800's

6. bohr

   • developed a mathematical model of the hydrogen atom
   • 1913
   • bohr constructed a model of the atom that he thought looked like he made the discovery by
     • doing tests on hydrogen
   • 1913
   • 1900's
   • electrons orbit the nucleus in shells.