The typical elements are so named because they represent the properties of other elements in their r — Periodic Table and Periodicity Chemistry Question

💡 Solution & Explanation

Elements of the 3rd period ($Na, Mg, Al, Si, P, S, Cl$) are called typical elements because they summarize the properties of their respective groups without the anomaly of lacking d-orbitals (like 2nd period elements) or having filled d-orbitals (like 4th period elements). Potassium ($K$) belongs to the 4th period and is not a typical element.