C4 Revision by Sarah

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Across
  1. 1. Newland's theory - law of _________
  2. 4. Ionic compounds conduct electricity when their ions are free to _____
  3. 7. A compound ending in -ate or -ite contains _________
  4. 8. Test for hydrogen (7,3)
  5. 12. 2+ ions formed when an atom ______ 2 electrons
  6. 13. Materials that conduct electricity with little or no resistance
  7. 15. Form positive ions
  8. 17. Colour that potassium turns a flame
  9. 19. Bonding between two non-metals
  10. 20. Periodic table today is organised by atomic _________
Down
  1. 2. Multiple elements that have been chemically combined
  2. 3. Charged particles
  3. 5. State at which ionic compounds conduct electricity
  4. 6. Electrons orbit in ______
  5. 9. A solid formed from two solutions reacting in a precipitation reaction
  6. 10. ______ table of elements
  7. 11. Form negative ions
  8. 13. Substances with low melting points and boiling points have _____ molecular structure
  9. 14. A sea of electrons are _______ (spelt with an 's')
  10. 16. Giant ionic _______, a diagram of ionic substances
  11. 18. Group 7 elements