Chapter 4

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