Y8 - Matter Crossword

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Across
  1. 6. Single unit of a polymer
  2. 7. Tells you the number of electrons in the outer shell of an atom
  3. 9. Centre of an atom contain protons and neutrons
  4. 11. Example of an alkali metal
  5. 12. Sub-atomic particle with a positive charge
  6. 14. Example of a halogen
  7. 17. Group on the periodic table whose elements reactivity decreases as you go down the group
  8. 18. Sub-atomic particle with a negative charge
  9. 19. Sub-atomic particle with no charge
  10. 21. Word describing a substance that has been made by humans
  11. 23. Group on the periodic table whose elements reactivity increases as you go down the group
  12. 25. Repeating identical units in a long chain
Down
  1. 1. Tells you the number of shells an atom has
  2. 2. Group on the periodic table whose elements are unreactive
  3. 3. Group 7 elements
  4. 4. Smallest part of an element
  5. 5. The alkali metals
  6. 8. Salt water (for example)
  7. 10. Two or more elements chemically bonded together
  8. 13. Example of a noble gas
  9. 15. Tungstan (for example)
  10. 16. Word meaning unreactive used to describe the noble gases
  11. 20. Example of a natural polymer
  12. 21. Where electrons are found on an atom
  13. 22. Elements that are on the right hand side of the periodic table
  14. 24. Elements that are on the left hand side of the periodic table