Periodic Table

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Across
  1. 1. H
  2. 4. Particles in the nucleus that are electrically neutral
  3. 5. N
  4. 7. Particles in the nucleus with a positive charge of 1
  5. 9. The smallest particle of an element that retains the elements properties
  6. 14. P
  7. 15. Group 17
  8. 16. Group 1
  9. 17. Rows on the Periodic Table
  10. 19. S
  11. 20. C
Down
  1. 2. The positively charged center of an atom
  2. 3. Found left of the stair-step line
  3. 6. Atoms of the same element that have different numbers of neutrons
  4. 8. Found right of the stair-step line
  5. 10. Columns on the Periodic Table
  6. 11. Particles with a charge of -1 that occupies the space around the nucleus
  7. 12. Group 2
  8. 13. K
  9. 18. O