What is periodic table definition?

The periodic table is an arrangement of chemical elements according to their atomic structure, chemical properties, and reactivity. It is a tabular representation of all known chemical elements, arranged in rows and columns based on their atomic number, electron configurations, and chemical properties. The table is organized so that elements with similar properties are placed together in the same column, also called a group or family. It is a useful tool used by chemists to predict the chemical behavior of elements and identify patterns in chemical properties. The modern periodic table contains 118 confirmed chemical elements, including 94 naturally occurring elements and 24 synthetic elements.