CHEMISTRY REVISION

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Across
  1. 2. metal which has a blue-green flame colour
  2. 4. amount of substance per unit volume
  3. 6. ______ name of the fruit Indigenous people detoxified
  4. 10. who's gas law states that volume is directly proportional to temperature
  5. 11. the precipitate lead sulfate is ________
  6. 13. oxidation and reduction happen simultaneously
  7. 15. oxidation involves the _______ of electrons
  8. 16. ______ decay involves the emission of a helium nucleus
  9. 18. process where gas is changed to liquid
  10. 19. reduction involves the _______ of electrons
  11. 21. reaction that absorbs heat from surroundings
  12. 22. separation technique to separate salt dissolved in water
  13. 24. state of matter which has the greatest entropy
  14. 25. acronym to remember what happens to electrons in redox reactions
  15. 27. substances that provides an alternative pathway of lower activation energy without being consumed in the reaction
  16. 29. an increase in ______ increases the kinetic energy of reactant particles
  17. 30. particles must have the correct molecular _______ in order to collide successfully
  18. 34. chemical bond where electrons are shared between atoms
  19. 35. reaction that releases heat to surroundings
  20. 36. _________ energy is the amount of energy required to remove an electron
  21. 38. ________ reagent is the reactant that is used up first
Down
  1. 1. element with the same number of protons and electrons but differs in the number of neutrons
  2. 3. _______ formula shows the simplest whole number ratio of atoms in a compound
  3. 5. HCl is _______ acid
  4. 7. _________ forces are the weakest intermolecular force
  5. 8. ________ formula shows the actual number of atoms in a compound
  6. 9. atomic radius _____ as you move down the group
  7. 11. reaction when the change in Gibbs Free energy is negative
  8. 12. separation technique to separate oil and water
  9. 14. type of bonding between water molecule
  10. 17. tendency for an atom to attract bonding electrons to itself
  11. 20. ______ number is the number of protons in an atom's nucleus
  12. 21. negatively charged subatomic particle that orbits the nucleus of an atom
  13. 23. who's gas law states that pressure is inversely proportional to volume
  14. 26. smallest unit of an element
  15. 28. molecular geometry of a methane molecule
  16. 31. ________ reactions involve burning in oxygen to produce CO2 and water
  17. 32. molecular geometry of a water molecule
  18. 33. 6.022 x 10^23 units
  19. 37. chemical bond where electrons are transferred between atoms