Science Chapter 5

A substance that undergoes a chemical change

A substance that is the result of a chemical change

The energy stored within atoms and molecules that can be released when a substance reacts

• a reaction that transfers energy from the reactants to the surrounding as heat
• temperature rises

• A reaction in which energy is transferred to the reactants as heat from the surroundings
• temperature decreases

A reaction of at least two substances that forms a new, more complex compound

A reaction in which one compound breaks into at least two products

the decomposition of a compound by an electric current

A reaction in which a compound and oxygen burn

a reaction in which atoms of one element take the place of atoms of another element in a compound

A reaction in which a gas, a solid precipitate, or a molecular compound is formed from the apparent exchange of ions between two compounds

A reaction that occurs when electrons are transferred from one reactant to another

the fragments of molecules that have at least one electron available for bonding

An equation that uses chemical formulas and symbols to show the reactants and products in a chemical reaction

the smallest relative number of moles of the substances involved in a reaction

a substance that changes the rate of chemical reactions without being consumed

a protein that speeds up a specific biochemical reaction

the specific substance affected by an enzyme

the state in which a chemical reaction and its reverse occur at the same time and at the same rate