Light
The units for k, also known as the rate constant, depend on the overall order of the reaction. For an overall reaction order of 0, the units for k are typically M/s or mol/L*s.
The minimum energy required for a chemical reaction to occur.
The theory that states that chemical reactions can occur when reactant particles collide with sufficient energy and proper orientation.
A substance that increases the rate of a chemical reaction without being consumed itself.