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Chapter 12 Science Exam Test

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4 Written Questions

4 Multiple Choice Questions

  1. 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
  2. Groups 3-12, 1-2 electrons in the outer energy level, less reactive than alsali-earth metals, shiny, good conductor of thermal energy and electrical current, high density
  3. highly reactive, group 1
  4. proposed modern periodic table, arranged table in order of atomic number instead of mass, came up with periodic law--physical and chemical properties of the elements are periodic functions of thier atomic number

4 True/False Questions

  1. Dmitri MendeleevRussian 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


  2. periodhorizontal row of elements in the periodic table


  3. Periodic Lawrecurring or reappearing from time to time


  4. grouphorizontal row of elements in the periodic table


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