The elements in each column of the representative elements series of the periodic table have the same number of valence electrons in their outermost energy level.
The representative elements in the periodic table are known as the main group elements or the "A" group elements. These elements are organized in columns or groups on the periodic table. The elements within each column or group of the representative elements series have the same number of valence electrons. Valence electrons are the electrons in the outermost energy level of an atom, and they determine an element's chemical properties. Therefore, the elements within each column of the representative elements series have similar chemical properties due to their similar number of valence electrons. This property allows scientists to predict the behavior and reactivity of elements in the same column or group.
