C4 The Periodic Table

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Across
  1. 3. A chemical able to be dissolved in a SOLVENT.
  2. 4. A subatomic particle with a positive electric charge.
  3. 8. Different forms of the same element, which have the same number of PROTONS, but a different number of NEUTRONS.
  4. 9. A man who created the basis for the modern periodic table.
  5. 11. A metal that is found in the middle block of the periodic table. Examples include copper, zinc and iron.
  6. 13. Elements in group 1 which have 1 electron in their outer shell.
  7. 18. The energy levels which ELECTRONS can inhabit.
  8. 19. When two SOLUTIONS react to form an insoluble solid.
  9. 23. The way in which ELECTRONS are organised across SHELLS.
  10. 25. A structure formed between metal and non-metal IONS.
  11. 27. A type of bonding which happens when two non-metals share electrons in their outer shells.
  12. 28. A man who, in 1828, put elements into groups, called triads, based on their Chemical properties.
  13. 29. A subatomic particle with no electric charge.
Down
  1. 1. The centre of an ATOM that contains the PROTON and NEUTRON.
  2. 2. Elements in group 7 which have 7 electrons in their outer shell.
  3. 5. The loss of electrons.
  4. 6. The process of breaking down a substance by heating.
  5. 7. A mixture of a SOLVENT and SOLUTES.
  6. 10. A type of bonding which happens between oppositely charged IONS.
  7. 12. The mass of a NUCLEUS of an ATOM.
  8. 14. A substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.
  9. 15. The gain of electrons.
  10. 16. A type of bonding which happens between metals. The outer electrons of the metals move freely.
  11. 17. Metals that are cold enough that they have no electric resistance.
  12. 20. The number on the periodic table that tells you how many PROTONS any atom has.
  13. 21. A man who, in 1864, put elements into rows of 7, as he noticed every 8th element had similar properties.
  14. 22. A chemical able to dissolve other substances.
  15. 23. A subatomic particle with a negative electric charge.
  16. 24. The smallest particle of a chemical element that can exist.
  17. 26. An atom that has become charged due to the loss or gain of electrons.