Chemical Equations and the Periodic Table

A chemical reaction can be described by associated numbers and symbols. The chemical number identifies how many protons are in an atom, and the atomic mass unit identifies how many units of an element are present. 

POTASSIUM CALCIUM SCANDIUM TITANIUM VANADIUM CHROMIUM lANGANPAP IRON COBALT NICKEL 7MT GALLIUM GERMANHJM ARSBNK S BBUM BRHEIC KRYPTON 

RUBIDIUM STRONTIUM VITRIUM ZIRCONIUM NIOBIUM /lOLVBDBNUM TECHNETIUN RUTHENIUM RHODIUM PALLADIUM SILVER CADIUM INDIUM TIN ANTIMONY TELLURIUM IODINE XENON 

In a chemical equation, the raw materials or reactants are placed on the left side. As the reactants are mixed together, they yield predictable products. A yield sign or arrow immediately follows the reactants. The products are placed on the right side of the equation. Because atoms cannot be created or destroyed, a common rule of thumb is what goes into a chemical equation must come out. The sum of the reactants must equal the sum of the products. 

To work out mass relationships, you need to have a good understanding of the chemical element chart. Certain elements combine to form chemicals that you will recognize easily for example, water (H2O) or carbon dioxide (CO2). The elements and atomic mass units are listed on the periodic table. 

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