Chapter 5

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