How the Periodic Table Works

The periodic table is made up of elements that are organized based on their atomic numbers. The number on the top left of the element is called the Atomic Number. The element symbol is the letter(s) in the middle of the element box on the table. The Atomic mass is at the bottom of the element box. The table consists of groups and periods.The color of the  atomic number shows if an element is a  liquid, gas, solid, or unknown. Groups run vertically while Rows, or periods, go from left to right. Elements that have similar properties are in groups.