Chapt 5 vocab

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Across
  1. 6. one twelfth the mass of a carbon-12 atom
  2. 7. a row in a periodic table of elements Group a column of elements in a periodic table
  3. 8. the pattern of repeating properties displayed by elements in the periodic table
  4. 9. elements that are good conductors of heat and electric current
Down
  1. 1. an electron that is in the highest occupied energy level of an atom
  2. 2. the elements in group 1A of the periodic table, not including hydrogen Alkalineearthmetals the elements in group 2A of the periodic table
  3. 3. an arrangement of elements in columns, based on a set of properties that repeat from row to row
  4. 4. elements that form a bridge between elements on the left and right sides of the periodic table
  5. 5. elements that are poor conductors of heat and electric current. Metalloids elements with properties that fall between those of metals and nonmetals