Across
- 1. a loose orange brown flaky layer of hydrated iron oxide.
- 2. The product (other than water) of the reaction between an acid and a base.
- 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.
- 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.
- 8. A process when you add solvent to a solution to make it less concentrated.
- 9. An expression showing the chemical formulas of the reactants and products (both in symbols).
- 10. The electrode in which reduction occurs.
- 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.
- 17. an alloy of iron with other elements.
- 18. An organic compound containing the hydroxyl group -OH.
- 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.
- 26. the breaking down of long-chain alkanes into smaller alkanes and alkenes using a catalyst and heat (500 C).
- 29. weak forces of attraction between
- 33. A breakdown reaction of a compound into two or more components.
- 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).
- 36. An atom or molecule that has lost or gained one or more electrons, and thus becomes positively or negatively charged.
- 37. Anything that occupies space and possesses mass.
- 40. The separation of a mixture by making use of the different volatilities of its components.
- 43. a list of metals with the most reactive metal first based on results from experiments.
- 45. a homologous series of hydrocarbons that are unsaturated as they have at least 1 double bond somewhere in the chain.
- 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.
- 47. A reduced molecular formula.
Down
- 1. the insoluble part that remains behind in the filter paper during filtration or what is left in the flask.
- 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.
- 4. A state in which the rates of the forward and reverse reactions are equal.
- 6. an oily but soft substance used to reduce friction between two moving surfaces.
- 11. a chemical which oxidizes another chemical; it loses oxygen/gains electrons and becomes reduced.
- 12. a chemical reaction in which many small
- 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.
- 15. A solid solution composed of two or more metals, or of a metal or metals with one or two nonmetals.
- 16. The phenomenon of going from the gaseous state to the liquid state.
- 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.
- 19. regular 3-dimensional arrangement of the particles (atoms, ions or molecules).
- 20. A substance that increases the rate of a reaction without being consumed in the reaction.
- 21. A subatomic particle having a single positive electric charge.
- 22. A substance composed of atoms of two or more elements chemically united in fixed properties.
- 23. An energy-containing particle of light.
- 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.
- 27. The natural mineral source of a metal; e.g. hematite; etc.
- 28. horizontal row in the Periodic Table.
- 30. A reaction in which an atom, ion, or molecule loses an electron.
- 31. When the maximum amount of solute is dissolved in a liquid.
- 32. or monomers are joined together to form a long molecule called a polymer.
- 34. A type of covalent bond joining amino acids in a polypeptide.
- 38. A process in which a chemical change is produced by passing an electric current through a
- 39. an ore containing aluminium oxide from which aluminium is extracted.
- 41. a reaction between an acid and a base to produce water and a salt and sometimes also carbon dioxide.
- 42. A reaction that has both oxidation and reduction.
- 44. burning, the reacting of a substance with oxygen, exothermic.