2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/221757For studying the objectivity and the quality of a given form of the Periodic system as a single whole we compare plots of functions presenting properties of elements in pairs of periods. Using mathematical statistics we introduce a dimensionless parameter which indicates high quality of the long form of the Periodic system.7 pages, 1 tableGeneral Physicstext