Physical Science

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Across
  1. 3. 2nd element on periodic table
  2. 4. father of modern atomic theory
  3. 7. each column in periodic table
  4. 8. atomic # 20
  5. 9. symbol is Ag
  6. 13. group 2 on the periodic table.
  7. 16. gases group 18
  8. 18. 1st element on periodic table
  9. 19. atomic # 79
  10. 20. small particles; make up most of matter
Down
  1. 1. group 17
  2. 2. each row in periodic table
  3. 5. so soft, can be cut with knife.
  4. 6. best science teacher ever
  5. 10. can use the inner shell before using the outer shell
  6. 11. discovered neutron
  7. 12. charged atom
  8. 14. brittle right side of periodic table
  9. 15. semiconductors
  10. 17. most of the elements