Balancing Equations

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Across
  1. 5. Groups 1-2 and 13-18, similar properties
  2. 7. Can never be changed or it will change the element
  3. 11. Below the main body of the periodic table
  4. 12. prefix of one
  5. 13. States no matter can be destroyed or created, only transformed
  6. 14. Iron (II) Bromide
  7. 15. The ionic compoud then forms when opposite ions combine
Down
  1. 1. Oxide Li2O
  2. 2. Groups 3-12, less similar properties
  3. 3. The number you place in an equation to balance it
  4. 4. W, transition group, period 6
  5. 6. The charge of a monatomic element
  6. 8. Strontium oxide
  7. 9. prefix of 7
  8. 10. In the outermost energy level