The basic theme of organization in the periodic table is to classify the elements into periods (horizontal rows) and groups (vertical columns) according to their properties. This arrangement is based on the increasing atomic number of elements and groups together elements with similar physical and chemical properties, making the study and understanding of their behavior systematic and simpler. Elements in the same group have analogous properties, and the periodic table reflects the periodic recurrence of elemental properties, allowing elements with similar properties to be studied collectively rather than individually.
