1) A chemical equation is a symbolic representation of a chemical reaction using element symbols and formulas to show reactants and products. 2) Chemical equations must be balanced so that the same number of each type of atom is on both sides of the reaction arrow. 3) To balance equations, coefficients are placed in front of formulas to adjust the relative numbers of elements and compounds until both sides have equal quantities.

1. Chemical Equations Putting chemical changes into words

2. A chemical equation is a symbolic representation of a chemical reaction.

15. Sources http://en.wikipedia.org/wiki/Chemical_equations Adapted from: http://www.science-class. net/PowerPoints/Chemical %20Equations_files/frame. htm