The periodic table is a tabular arrangement of chemical elements, organized based on their atomic number, electron configuration, and chemical properties.
Elements are presented in rows and columns, with each element assigned a unique chemical symbol and atomic number.+
The table helps scientists understand the relationships between elements and predict their behavior in chemical reactions. It was first devised by Dmitri Mendeleev in the 19th century and has since become a fundamental tool in chemistry, guiding research, education, and the classification of the over 100 known elements.