G9 Chemistry Revision

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Across
  1. 2. The smallest part of an element that takes part in chemical change
  2. 6. A soluble base
  3. 8. Particles do not move around, but vibrate in fixed positions
  4. 10. The taste of an acid
  5. 15. A neutrally charged subatomic particle in the nucleus of the atom
  6. 19. A substance that produces Hydroxide Ions when dissolved in water
  7. 21. A chemical bond that involves the sharing of electron pairs between atoms.
  8. 22. The type of ions released when an acid is placed in an aqueous solution
  9. 23. The salt formed by the reaction of hydrochloric acid and a base
  10. 26. A base dissolved in water
  11. 27. Chemical structures which exist in two or more different forms (eg. diamond and graphite).
  12. 29. 2 or more substances mixed together but not chemically combined
  13. 31. When two atoms join chemically.
  14. 35. The state of a substance with a pH of 7
  15. 36. Particle made up of 2 or more atoms held together by chemical bonds
  16. 37. A three-dimensional structure containing millions of atoms joined by covalent bonds
  17. 38. Bases have a pH above this number
  18. 39. A negatively charged subatomic particle inside an atom
Down
  1. 1. This chemical is found in marble and limestone
  2. 3. and water Water Metal (oxide) + acid
  3. 4. Particles move around quickly in all directions
  4. 5. Turns blue when in contact with an alkali, red when in contact with an acid
  5. 7. A charged atom or molecule.
  6. 9. Atoms of the same element which have the same proton number but a different neutron number
  7. 11. The process in which a known concentration of a substance is gradually added an unknown substance to discover the amount needed to react exactly with the original substance.
  8. 12. The part of an atom where electrons are found orbiting the atom's nucleus.
  9. 13. The cancelling out of an acid and base in a reaction of H+ with OH- in a solution to form water
  10. 14. A substance that produces Hydrogen Ions when dissolved in water
  11. 16. A substance that dissolves another substance
  12. 17. Particle made up of 2 or more different types of atoms chemically combined
  13. 18. A bond created by the complete transfer of valence electron(s) between atoms.
  14. 20. The method of analysis used to determine the concentration of a substance
  15. 24. Substance containing only one type of atom
  16. 25. Positively charged subatomic particle in the nucleus of an atom
  17. 28. Particles are free to move past each other
  18. 30. The method used to obtain the solute from a solution (base and alkali)
  19. 32. Is a compound formed when a metal replaces hydrogen in an acid
  20. 33. Weak alkalis are represented as blue on this indicator
  21. 34. The central part of the atom which contains the bulk of the atoms’ weight