Periodic Table Crossword

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Across
  1. 3. The number of protons in the nucleus of an atom
  2. 8. The name for Group 2
  3. 10. A small particle with a negative charge that is found in all atoms.
  4. 11. Diagrams that show the atomic structure of an atom
  5. 13. The amount of Valence E- in group 13
  6. 14. Semi-conductor Solids
  7. 15. Most reactive NON-METALS
  8. 17. Non-reactive elements
  9. 18. The amount of Valence E- in group 18
  10. 19. The atoms in the outermost energy level in the electron cloud
Down
  1. 1. Dull, brittle solids
  2. 2. The positively charged central core of an atom
  3. 3. Most reactive Metals
  4. 4. Vertical columns on the Periodic Table
  5. 5. Shiny, silvery solids
  6. 6. The name for Group 3
  7. 7. The horizontal rows on the period table
  8. 9. A small, positively charged particle of matter found in the atoms of all elements.
  9. 12. Elements in the middle of the table
  10. 16. Subatomic particles found inside the nucleus of every atom