Periodic Table

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