A change that occurs when two substances react to produce entirely different substances.
chemical equation (balanced)
An equation with an equal number of atoms in the reactants and products.
A representation of a compound that includes the symbols and numbers of atoms in the compound.
The breaking of bonds to form new substances.
The "6" in 6H2O
A bond between atoms in which electrons are shared.
The substance produced in a chemical reaction.
A substance that enters into and is changed during a chemical reaction.
The "2" in H2O
An atom that has an electrical charge because it gained or lost an electron.
A bond between atoms in which electrons are lost or gained.
law of conservation of mass
You cannot create or lose mass in a reaction.
Most atoms need eight valence electrons to be stable.
A number that indicates how many electrons will be gained or lost during bonding.
Ice melting is an example of this kind of change.
An ion like CO3 or OH
A chemical reaction in which energy is released.
A chemical reaction in which energy is required.
A reaction that involves splitting the nucleus of an atom or fusing 2 nuclei to make a new atom.
The process of combining the nuclei of atoms to make different atoms.
Breaking up the nucleus of an atom.