Chemistry Crossword

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Across
  1. 3. State without charge
  2. 5. A particle carrying light
  3. 8. The last shell in the electron config.
  4. 12. A negatively charged ion
  5. 15. The building blocks of the universe
  6. 16. Name of elements in the middle
  7. 19. Number of protons plus electrons
  8. 21. A particle circling the atom
  9. 23. The centre of an atom
  10. 24. Elements 57-71
  11. 25. Electrons in the last electron shell
  12. 27. An atom with more/less electrons
  13. 28. Group 18 on the periodic table
  14. 29. Group 17 in Periodic table
Down
  1. 1. An element with more/less neutrons
  2. 2. Number of protons
  3. 4. The charged state of an atom
  4. 5. Rows in the Periodic Table
  5. 6. Elements with mixtures of metals and non metals
  6. 7. Transfer of valence electrons
  7. 9. Group 1 of the periodic table
  8. 10. Two bonded elements
  9. 11. The setup of electrons
  10. 13. Current model of atom
  11. 14. Columns in the periodic table
  12. 17. Elements 89-103
  13. 18. The space around an atom that electrons travel in
  14. 20. Simplest form of a substance
  15. 22. Positively charged ion
  16. 26. Subatomic particle with no charge