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7 Written Questions

6 Multiple Choice Questions

  1. 1. 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. weighted average of all the isotopes
  3. Discovered the electron, Plum Pudding Model, Cathode Ray Experiment (ray of electrons bent toward the positive plate)
  4. Protons and neutrons, make up most of the mass of the atom, extremely dense
  5. Group 7A (aka Group 17); never found alone in nature; make -1 ions; Fluoride (F) and Chloride (Cl) are gases at room temperature; Bromine (Br) and Iodine (I) are liquids at room temperature; Astatine (At) is not a halogen
  6. Group 1A (aka Group 1); low density, soft, never found alone in nature, reacts with water, make +1 ions, hydrogen is not an alkali metal

6 True/False Questions

  1. Alkaline Earth MetalsGroup 2A (aka Group 2); shiny solids; harder than alkali metals; turn white when exposed to oxygen; never found alone in nature; make +2 ions

          

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

          

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

          

  4. Transition ElementsGroups 3-12

          

  5. Ernest RutherfordNumber of protons plus number of neutrons (A)

          

  6. Mass NumberNumber of Protons (Z)

          

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