Chemistry

123456789101112131415161718192021222324252627282930
Across
  1. 4. chemical symbol of the only liquid metal at room temperature
  2. 6. You need this metal for strong bones
  3. 7. Protons and neutrons have a mass of
  4. 9. What diamonds are made from
  5. 10. Rows in the periodic table
  6. 15. Not all treasure is ______ and gold.
  7. 16. Country Dimitri was from
  8. 18. Second lightest element
  9. 19. Electrons are found in these in atoms
  10. 22. Element with chemical symbol Ir
  11. 23. The number of electrons and protons in an atom are
  12. 24. Father of the periodic table
  13. 27. Negatively charged particle
  14. 29. Neutrons have a charge of
  15. 30. Neutral subatomic particle
Down
  1. 1. The only element with a Z in
  2. 2. The basic building block. Elements are made of these.
  3. 3. Gas we exhale
  4. 5. Pirate's favourite metal
  5. 8. Columns in the periodic table
  6. 11. Gas we inhale to respire
  7. 12. A very reactive yellow gas
  8. 13. The only liquid non-metal at room temperature
  9. 14. Metal that melts just above room temperature
  10. 17. The centre of the atom is called this
  11. 20. Lightest element
  12. 21. John Newlands discovered this law
  13. 24. The element with the electron configuration 2,8,8,2
  14. 25. Positively charged particle
  15. 26. There are 118 different ones of these in the periodic table
  16. 28. Common chemical that covers 60% of the Earth's surface