Answer:
D. a reactant that is catalyzed by an enzyme
Explanation:
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Answer:
Ozone is a gas made up of three oxygen atoms (O3). It occurs naturally in small (trace) amounts in the upper atmosphere (the stratosphere). Ozone protects life on Earth from the Sun's ultraviolet (UV) radiation.
The process of an atom releasing energy when it moves to a lower energy state is called emission.
Answer:
Each row is called a period. Each column is called a group or family.
Explanation:
Reaction rates can be increased if the concentration of reactants is raised. An increase in concentration produces more collisions. The chances of an effective collision goes up with the increase in concentration. The exact relationship between reaction rate and concentration depends on the reaction "mechanism".
