Big Year 10 Chemistry Crossword

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Across
  1. 4. Elements with the same number of outer electrons are found in the same ______.
  2. 8. The least reactive element in group 1.
  3. 10. The subatomic particle with a negative charge.
  4. 14. Elements with the same number of electron shells are found in the same ______.
  5. 15. A reaction where a more reactive element swaps places with a less reactive element in a compound.
  6. 17. A reaction where the reactants can become the products then return to their starting state.
  7. 21. An ionic bond involves the _______ of electrons.
  8. 22. A covalent bond is made up of a _______ pair of electrons.
  9. 23. (aq) state symbol
  10. 24. The subatomic particle with a neutral charge.
Down
  1. 1. (l) state symbol
  2. 2. The type of bond that forms between two non metal atoms.
  3. 3. The subatomic particle with a positive charge.
  4. 5. The _____ pudding model was an early attempt to explain the structure of the atom.
  5. 6. A chemical that reduces the activation energy of a reaction.
  6. 7. The type of bond that forms between a metal and non metal atom.
  7. 9. The Russian scientist who developed a periodic table with gaps for undiscovered elements.
  8. 11. The most reactive element in group 7.
  9. 12. The type of bond that forms between a group of metal atoms
  10. 13. A metallic bond is made of ________ electrons.
  11. 16. A factor which increases the rate of a reaction.
  12. 18. Two atoms with the same number of protons but different numbers of neutrons.
  13. 19. (g) state symbol
  14. 20. Early periodic tables were order by atomic ______.
  15. 22. (s) state symbol