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5 Written questions

5 Matching questions

  1. Aufbau
  2. Soddy
  3. Einstein
  4. Mendeleev
  5. Dalton
  1. a arranged elements according to atomic mass, called it "Periodic Table"
  2. b proposed light is energy that behaves as particles, photoelectric effect
  3. c electrons enter lowest energy level first
  4. d tiny indivisible particles called atoms, combined, seperated, rearranged, subdivided, created, destroyed, size mass are identical
  5. e discovered isotope

5 Multiple choice questions

  1. designed balance, performed quantitative experiments, Law of Conservation of Mass
  2. discovered radioactivity
  3. observed rays in cathode ray tube traveling opposite direction, rays had positive charge known as proton
  4. discovered the neutron, no charge, same mass as proton
  5. max number of electrons in each orbital is 2 with opposite spins

5 True/False questions

  1. Millikanoil drop experiment led to determine the charge of an electron


  2. Bohrcontributed to concept of energy levels to atomic theory, electrons move in circular orbits around nucleus, electrons jump to different energy levels


  3. Planckproposed light energy is emitted as particles carrying definite quantities of energy in small amounts


  4. Schroedingerdesigned balance, performed quantitative experiments, Law of Conservation of Mass


  5. Berzeliusreplaced diagrams with letters for elements


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