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7 Written questions

6 Multiple choice questions

  1. weighted average of all the isotopes
  2. Groups 1A through 7A (aka Groups 1, 2, 13-18); display a wide range of physical and chemical properties
  3. 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
  4. Discovered the electron, Plum Pudding Model, Cathode Ray Experiment (ray of electrons bent toward the positive plate)
  5. 1 AMU is 1/12 of the mass of C-12
  6. Group 2A (aka Group 2); shiny solids; harder than alkali metals; turn white when exposed to oxygen; never found alone in nature; make +2 ions

6 True/False questions

  1. Dalton1. 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. Inner Transition MetalsGroups 3-12


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


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


  5. Alkali MetalsGroup 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. Atomic NumberNumber of Protons (Z)


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