General Chemistry

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Across
  1. 1. a loose orange brown flaky layer of hydrated iron oxide.
  2. 2. The product (other than water) of the reaction between an acid and a base.
  3. 5. a mixture of organic compounds formed, as a result of high temperatures and pressures, from the remains of living plants and animals which died millions of years ago.
  4. 7. One of several possible forms of a chemical element that differ from others in the number of neutrons in the atomic nucleus, but not in chemical properties.
  5. 8. A process when you add solvent to a solution to make it less concentrated.
  6. 9. An expression showing the chemical formulas of the reactants and products (both in symbols).
  7. 10. The electrode in which reduction occurs.
  8. 13. The number of protons in the nucleus of an atom; determines the identity of the element and the number of electrons in the neutral atom.
  9. 17. an alloy of iron with other elements.
  10. 18. An organic compound containing the hydroxyl group -OH.
  11. 25. a small molecule that can be joined together to make a long molecule called a polymer; a monomer must have a double bond or a functional group at either end.
  12. 26. the breaking down of long-chain alkanes into smaller alkanes and alkenes using a catalyst and heat (500 C).
  13. 29. weak forces of attraction between
  14. 33. A breakdown reaction of a compound into two or more components.
  15. 35. The analysis of composition by measuring the volume of one solution (titrant) needed to react with a given volume of another solution (the analyte).
  16. 36. An atom or molecule that has lost or gained one or more electrons, and thus becomes positively or negatively charged.
  17. 37. Anything that occupies space and possesses mass.
  18. 40. The separation of a mixture by making use of the different volatilities of its components.
  19. 43. a list of metals with the most reactive metal first based on results from experiments.
  20. 45. a homologous series of hydrocarbons that are unsaturated as they have at least 1 double bond somewhere in the chain.
  21. 46. the combining power of an atom or group of atoms; in an ionic compound the valency of an ion is its charge; in a molecule the valency of an atom is the number of bonds it makes.
  22. 47. A reduced molecular formula.
Down
  1. 1. the insoluble part that remains behind in the filter paper during filtration or what is left in the flask.
  2. 3. An element with properties intermediate between those of metals and nonmetals; i.e.: it has the physical appearance and properties of metal but behaves chemically like a nonmetal.
  3. 4. A state in which the rates of the forward and reverse reactions are equal.
  4. 6. an oily but soft substance used to reduce friction between two moving surfaces.
  5. 11. a chemical which oxidizes another chemical; it loses oxygen/gains electrons and becomes reduced.
  6. 12. a chemical reaction in which many small
  7. 14. An electrochemical cell, or often several electrochemical cells connected in series, that can be used as a source of direct electric current at a constant voltage.
  8. 15. A solid solution composed of two or more metals, or of a metal or metals with one or two nonmetals.
  9. 16. The phenomenon of going from the gaseous state to the liquid state.
  10. 17. a process during which a solid changes directly into a gas because its particles have alot more energy, move around very fast and are very far apart.
  11. 19. regular 3-dimensional arrangement of the particles (atoms, ions or molecules).
  12. 20. A substance that increases the rate of a reaction without being consumed in the reaction.
  13. 21. A subatomic particle having a single positive electric charge.
  14. 22. A substance composed of atoms of two or more elements chemically united in fixed properties.
  15. 23. An energy-containing particle of light.
  16. 24. The theory of elementary gas-phase bimolecular reactions in which it is assumed that molecules react only if they collide with at least enough kinetic energy for bonds to be broken.
  17. 27. The natural mineral source of a metal; e.g. hematite; etc.
  18. 28. horizontal row in the Periodic Table.
  19. 30. A reaction in which an atom, ion, or molecule loses an electron.
  20. 31. When the maximum amount of solute is dissolved in a liquid.
  21. 32. or monomers are joined together to form a long molecule called a polymer.
  22. 34. A type of covalent bond joining amino acids in a polypeptide.
  23. 38. A process in which a chemical change is produced by passing an electric current through a
  24. 39. an ore containing aluminium oxide from which aluminium is extracted.
  25. 41. a reaction between an acid and a base to produce water and a salt and sometimes also carbon dioxide.
  26. 42. A reaction that has both oxidation and reduction.
  27. 44. burning, the reacting of a substance with oxygen, exothermic.