Chemical Changes Revision Crossword Puzzle

QUESTIONS LIST:

• displacement: a reaction in which a more reactive element takes the place of a less reactive element in a compound.
• cation: a positive ion formed from the loss of electrons.
• anion: a negative ion formed from the gain of electrons.
• negative: the charge of an electron.
• proton: the positively charged sub-atomic particle found in the nucleus of an atom.
• electrolysis: the splitting of a substance using an electric current.
• cathode: the negative electrode.
• anode: the positive electrode.
• molten: a term used to describe a liquid substance formed by heating a solid.
• hydrogen: the gas produced when a metal reacts with acid.
• neutral: the word given to a substance with ph 7.
• salt: a substance formed when an acid and alkali react together.
• indicator: a substance used to test a substance's ph to see whether it is an acid or alkali.
• filtration: a technique to separate an insoluble solid from a liquid (eg - sand from saltwater).
• reduction: the loss of oxygen in a reaction.
• oxidation: the gain of oxygen in a reaction.