atomic structure

• give order of atomic model theories

  1. modern atomic theory
  2. electron discovery and plum pudding model
  3. nuclear model
  4. orbital model
  5. proton discovery
  6. neutron discovery
• describe modern atomic theory

  atoms as indivisible spheres
• describe electron discovery and plum pudding model

  jj thompson - positive sphere with embedded electrons
• describe nuclear model

  ernest rutherford - alpha particle scattering experiment concluded the mass and positive charge is concentrated in nucleus
• describe alpha scattering particle experiment

  alpha particles fired at thin sheet of gold

  expected - pass straight through

  results - deflected
• describe orbital model

  neils bohr - electrons orbit nucleus at specific distances
• describe proton discovery

  ernest rutherford - nucleus divided to smaller positive particles
• describe neutron discovery

  james chadwick - nucleus divided into smaller neutral particles