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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. Groups 3-12
  3. same element with different number of neutrons
  4. 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
  5. Protons and neutrons, make up most of the mass of the atom, extremely dense
  6. weighted average of all the isotopes

6 True/False Questions

  1. JJ Thomson1. 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

          

  2. Atomic NumberNumber of protons plus number of neutrons (A)

          

  3. Atomic Mass Unit (AMU)Number of Protons (Z)

          

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

          

  5. Representative ElementsGroups 3-12

          

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

          

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