Chapter 5

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