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4 Written questions

4 Multiple choice questions

  1. recurring or reappearing from time to time
  2. Russian Chemist, demonstrated a connection between atomic mass and elemental properties arranged the elements in order of increasing atomic mass predicted the existence and properties of undiscovered elements, Russian chemist who developed a periodic table of the chemical elements and predicted the discovery of several new elements
  3. group 17; contains nonmetals; 7 electrons in its outermost energy level; very reactive; poor conductors of electric current; never in its uncombined form in nature; combine with most metals to form salts
  4. Vertical column in the periodic table

4 True/False questions

  1. Periodic Lawthe principle that chemical properties of the elements are periodic functions of their atomic numbers

          

  2. Noble Gassesgroup 17; contains nonmetals; 7 electrons in its outermost energy level; very reactive; poor conductors of electric current; never in its uncombined form in nature; combine with most metals to form salts

          

  3. Akaline-Earth Metalshighly reactive, group 1

          

  4. Henry Moseleynon-metals, group 18, the most non-reactive elements