Chemistry Review Crossword

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Across
  1. 3. ____ are a negatively charged ion
  2. 4. ____ bonds transfer electrons
  3. 5. vertical columns on the periodic table
  4. 9. Neutrons + Protons
  5. 10. _____ bonds share electrons
  6. 13. horizontal rows on the periodic table
  7. 15. occurs when a compound is broken into two simpler products
  8. 16. metals found in group 2
  9. 18. a chemical change in which an element reacts with oxygen and produces Co2 and H2O
  10. 20. this subatomic particle has a negative charge
Down
  1. 1. have a proton to neutron ratio over 3:2
  2. 2. a subatomic particle with a positive or negative charge
  3. 6. This radiation can only be stopped by large amounts of concrete or lead
  4. 7. gasses found in group 18
  5. 8. this subatomic particle has a positive charge
  6. 11. metals that are found in group 1
  7. 12. same element with more or less neutrons
  8. 14. ____ is released from alpha radiation
  9. 17. elements found in group 17
  10. 18. ____ are a positively charged ion
  11. 19. organic compounds must include _____