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4 Written questions

4 Multiple choice questions

  1. elements belonging to group two on the periodic table. They are less reactive and harder than alkali metals.
  2. non-metals, group 18, the most non-reactive elements
  3. recurring or reappearing from time to time
  4. 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

4 True/False questions

  1. Periodic Tablea tabular arrangement of the chemical elements according to atomic number as based on the periodic law

          

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

          

  3. periodhorizontal row of elements in the periodic table

          

  4. Halogensgroup 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

          

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