Chemical reaction
Process in which atoms are rearranged to produce new substances
Chemical equation
Expression to show the relationship between reactants and products
Reactants
The substances that participate in (start) a chemical reaction
Products
The substances formed in a chemical reaction
Law of conservation of mass
Matter cannot be created or destroyed
Coefficient
Number in front of a chemical formula can change to balance an equation
Endothermic reaction
Chemical formula with an input of energy
Exothermic reaction
Chemical reaction with an output of energy