Since the arrow always points from reactants to products, the reactants would be on the right if the arrow is pointing this way. There are chemical reactions that begin to form products and the products break down into the original reactants. The small numbers to the lower right of chemical symbols. Subscripts represent the number of atoms of each element in the molecule. The large numbers in front of chemical formulas.
Coefficients represent the number of molecules of the substance in the reaction.
Just as subscripts of 1 are never written, coefficients of 1 are not written either. The subscript to the right of the parenthesis goes to all atoms inside. In each of the following equations, one of the reactant atoms is in bold type. The order in which these steps are performed is important. While there are some shortcuts that can be used, following these steps in the order given below is the best way to be sure your equation is correct.