Periodic Table Crossword

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Across
  1. 2. any of the elements lithium, sodium,potassium, rabidium, and francium
  2. 5. has a negative charge
  3. 7. any of the set of metallic elements
  4. 9. has no charge
  5. 10. the gaseous elements
  6. 11. they make up everything
  7. 16. particles that look the same
  8. 18. electrons in the outermost shell
  9. 19. reactivie non metallic elements
Down
  1. 1. cause chemical reactions
  2. 3. series of fifteen metallic elements from actinium to lawrencium
  3. 4. have a positive charge
  4. 6. a substance made up of 2 or more element chemically combined
  5. 8. the six chemical elements in column 2 of the periodic table
  6. 12. particles that look different
  7. 13. measurement of matter
  8. 14. an element that is not a metal
  9. 15. series fifteen metallic elements from lanthanum to lutetium
  10. 17. properties are internediate between those of metals