Reaction

the process of breaking chemical bonds in one or more substances and the reforming of new bonds to create new substances

• coefficient

• product

• chemical reaction

• reactant

a starting ingredient in a chemical reaction

• coefficient

• reactant

• product

• chemical equation

a new substance formed in a chemical reaction

• chemical reaction

• subscript

• reactant

• product

states that the total mass of the reactants equals the total mass of the products in a chemical reaction

• law of conservation of mass

• chemical equation

• reaction

• coefficient

an expression of a chemical reaction using chemical formulas and symbols

• endothermic

• exothermic

• chemical reaction

• chemical equation

a whole number placed in front of a chemical formula in a chemical equation

• coefficient

• subscript

• activation energy

• endothermic

A number written slightly below and to the right of a chemical symbol that shows how many atoms of an element are in a compound.

• reaction rate

• exothermic

• subscript

• activation energy

describes a chemical reaction that releases energy

• catalyst

• exothermic

• endothermic

• reaction

describes a chemical reaction that absorbs energy

• activation energy

• catalyst

• exothermic

• endothermic

energy needed to break chemical bonds in the reactants to start a reaction

• catalyst

• inhibitor

• activation energy

• reaction rate