Chapter 4

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Across
  1. 2. typically have four or more valence electrons
  2. 5. contains metals nonmetals and metalloids
  3. 7. electron on the outermost energy level in a neutral atom
  4. 9. states that the properties of the elements vary in a periodic way with their atomic numbers th their
  5. 11. a set of elements in the same common
  6. 13. have two or more valence electrons and tend to lose them
  7. 15. 80% of elements that have few valence electrons
  8. 16. two valence electrons and are rare and are use lasers
Down
  1. 1. characteristics of metals and nonmetals
  2. 3. 8 valence electrons and are chemically bonded
  3. 4. family
  4. 6. a table of chemical elements arranged in a way that displays there periodic propereties
  5. 8. they have one valence electron and are very reactive
  6. 10. two valence electrons and tend to lose them
  7. 12. 7 valence electrons highly reactive
  8. 14. columns and rows in the periodic table