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Chemical reaction
Rearranging atoms to make new chemicals
Conservation of mass
Matter is not created or destroyed during a chemical reaction
Mass of products =
The mass of the reactants
Balanced symbol equation
symbol equation in which there are equal numbers of each type of atom on either side of the equation
Reason mass decreases in a reaction
A new gas is formed
Reason mass increases in a reaction
A reactant is a gas
Coefficient
Big numbers in front of formulae which multiply a formula 2NaCl
Word equation
An equation in which the reactants and products in a chemical reaction are represented by words
Reactant
A starting material in a chemical reaction
Products
The new substance produced by a chemical reaction.
