Chemistry C4

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Across
  1. 1. number of protons and neutrons in the nucleus
  2. 4. metallic bonding allow metals to conduct heat and electricity
  3. 9. number of protons in the nucleus
  4. 11. loss of electron
  5. 12. lithium, sulphur, oxygen
  6. 16. mix of metals, some contain carbon
  7. 17. formed when 2 or more elements are joined together chemically
  8. 18. used in fertilisers
Down
  1. 2. group 1 elements
  2. 3. gain of electron
  3. 5. bond between non-metal and metal
  4. 6. materials that conduct electricity with little or no resistance
  5. 7. Group 7 metals
  6. 8. same number of protons but different number of neutrons
  7. 10. solid at room temperature, high melting point, good conductors of electricity
  8. 13. bonds between metals and non-metals
  9. 14. squeaky pop
  10. 15. do not break- delocalized electrons are free to move