The Periodic Table

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Across
  1. 5. An atom found in Coke cans
  2. 7. Has the chemical symbol Fe
  3. 9. Has the chemical symbol Zn
  4. 10. Made up of protons and neutrons
  5. 11. Has the chemical symbol Pb
  6. 12. A substance made up of one atom only
  7. 13. Has the chemical symbol Au
  8. 14. Has a negative charge
  9. 19. Has the chemical symbol Ag
  10. 20. Has the chemical symbol He
  11. 21. A column in the Periodic Table
  12. 23. A very valuable metal with the chemical symbol Pt
  13. 25. The element found in all living things
Down
  1. 1. mass The number of protons and neutrons in an atom
  2. 2. An essential element for strong bones
  3. 3. Formed when an atom gains or loses electrons
  4. 4. number The number of protons in an atom
  5. 6. Has the chemical symbol Mn
  6. 8. Has no charge
  7. 15. Has the chemical symbol Li
  8. 16. Electrons are arranged in these in the atom
  9. 17. Has the chemical symbol Cu
  10. 18. A row in the Periodic Table
  11. 22. Has a positive charge
  12. 24. Has the chemical symbol Hg