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7 Written questions

6 Multiple choice questions

  1. Discovered that the nucleus was positive, mostly empty space, and very dense. Also discovered the proton. Performed the Gold Foil Experiment
  2. weighted average of all the isotopes
  3. Top row: Lanthanides (4f); Bottom Row: Actinides (5f); most are radioactive; all actinides starting at plutonium are man-made; all are solids
  4. 1 AMU is 1/12 of the mass of C-12
  5. Group 8A (aka Group 18); all inert (non-reactive) gases; always found alone in nature; all other elements strive to have a noble gas configuration
  6. Groups 1A through 7A (aka Groups 1, 2, 13-18); display a wide range of physical and chemical properties

6 True/False questions

  1. James ChadwickDiscovered the neutron, worked on the Manhattan Project during WWII


  2. DemocritusProtons and neutrons, make up most of the mass of the atom, extremely dense


  3. Mass NumberNumber of Protons (Z)


  4. Isotopes1. All elements are composed of tiny indivisible particles called atoms
    2.Atoms of the same elements are the same
    3. atoms can be combined in simple whole number ratios to make compounds
    4. Chemical reactions occur when atoms are separated, joined, rearranged


  5. JJ ThomsonDiscovered the electron, Plum Pudding Model, Cathode Ray Experiment (ray of electrons bent toward the positive plate)


  6. Robert MillikanFound mass and charge of electron, performed oil drop experiment