The periodic table is a complete list of all 118 known chemical elements, arranged in order of increasing atomic number. Each element has unique properties and is represented by a one- or two-letter symbol. From the simplest, hydrogen, to the heaviest, oganesson, the elements are grouped based on shared chemical behavior into categories like metals, nonmetals, and metalloids. The table is a vital tool in science, helping us understand the building blocks of matter. It includes familiar elements like oxygen, carbon, and gold, as well as rare and synthetic ones like einsteinium and tennessine. It's essential for chemistry and beyond. How many do you know? BE HONEST.