1 Time-Pathogenic bacteria need enough time in order to multiply. 2  The number of bacteria will reach dangerous levels very quickly in a short period of time in perfect conditions. 3  Keep in mind that bacteria can reproduce every 20 minutes in perfect conditions.
Nuclear chemistry is a sub-discipline of chemistry that involves the chemical reactions of unstable and radioactive elements where both electronic and nuclear changes may occur. The substance (or substances) initially involved in a chemical reaction are called reactants or reagents. Chemical reactions are usually characterized by a chemical change, and they yield one or more products, which usually have properties different from the reactants.
Reactants (or 'substrates') are two or more elements/ compounds that chemically interact to form a new substance. They are the starting materials for a reaction and are always found at the left side of a chemical equations.A reactant is one of the inputs in a reaction, that get changed. The word reactant is used in chemistry. A substance that has a reaction and undergoes a change is considered reactant.hey are the starting materials for a reaction and are always found at the left side of a chemical equations. A reactant is one of the inputs in a reaction, that get changed. The word reactant is used in chemistry.