Crossword

3. A mixture of finely powdered aluminium and iron oxide that produces a very high temperature on combustion, used in welding and for incendiary bombs.
4. Two or more reactants combine to form a single product.
5. A chemical reaction where two reactant ionic compounds exchange ions to form two new product compounds with the same ions.
6. A reaction in which soluble ions in separate solutions are mixed together to form an insoluble compound that settles out of solution as a solid.
9. A relation stating that in a chemical reaction, the mass of the products equals the mass of the reactants.
10. A chemical reaction expressed in words rather than chemical formulas.
11. Interaction of two or more chemicals that produces one or more new chemical compounds, or alters the properties of the mixed chemicals.

1. The separation of a chemical compound into elements or simpler compounds
2. A substance that takes part in and undergoes change during a reaction.
4. Type of reaction where part of one reactant is replaced by another reactant.
6. A substance that is formed as the result of a chemical reaction
7. A red-brown metal, the chemical element of atomic number 29.
8. A substance which has a molecular structure built up almost or completely from a large number of similar units bonded together