physical science

• Father of Modern periodic table

  Dmitri Ivanovich Mendeleev
• solid sphere model or bowling ball model


  J. Dalton (1807)
• give 3 sub atomic particles

  neutron, proton, and electrons
• positively changed protons and neutral neutrons are tightly held in the center of nucleus

  Neil Bohr (1913)
• nuclear model

  Ernest Rutherford
• inside or center of the atoms

  neutron and protons
• outside of the atoms


  electrons
• plum pudding / raisin bread


  john joseph thomson (1897)
• how many elements in the MTD

  118
• 4 Postulates of modern atomic theory

  1. elements are made of very small particles called atom (John Dalton) – water and carbon dioxide
  2. Law of Definite composition proposed by Joseph Proust – always contains the same element
  3. Law of Multiple Proportion (John Dalton) combine two compounds will still make a whole number

  4. Law of Conservation of Mass (Antoine Laurent Lavoisier)