Periodic Table

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Across
  1. 1. elements that are good conductors of electric current and heat.
  2. 4. Each row in the periodic table of elements.
  3. 5. elements in group 8A and most have 8 valence electrons.
  4. 7. in group 2A and have 2 valence electrons.
  5. 9. An arrangement of elements in columns based on a set of properties.
  6. 11. A pattern of repeating properties.
  7. 12. one twelfth the mass of carbon-12.
  8. 14. elements in group 7A and have 7 valence electrons.
Down
  1. 2. elements that form a bridge between the elements on the left and right sides of the table.
  2. 3. electron that is in the highest occupied energy level of an atom.
  3. 6. elements with properties that fall between those of metals and nonmetals.
  4. 8. elements in group 1A and have single valence electron.
  5. 10. Each column on the periodic table of elements.
  6. 13. elements that are poor conductors of heat and electric current.