Reactions

Synthesis: Synthesis is adding two elements together to equal one new element. C+D=CD

Decomposition: The opposite of synthesis. Break down the elements to separate the compound element. CD=C+D

Single-Replacement: A metal replaces a metal, and a nonmetal replaces a nonmetal. F+GH turns into FH+G.

Double-Replacement: The same rules follow as single-replacement. RD+MC turns into RC+MD

Combustion: all substances in a compound are combined with oxygen, combustion means burning. Heat is easily produced, but can be easily distinguished. C_xH_y + O₂ --> CO₂ + H₂O

http://library.thinkquest.org/2923/react.html