The elements in each column of the representative elements series, also known as the "A" groups or the main group elements, have the same number of valence electrons in their outermost energy level. This property is commonly known as the valence electron configuration. For example, Group 1 elements (alkali metals) all have 1 valence electron, Group 2 elements (alkaline earth metals) have 2 valence electrons, Group 13 elements have 3 valence electrons, and so on. This similar valence electron configuration contributes to similar chemical properties and reactivity among elements in the same column.
The elements in each column of the representative elements series of the periodic table have a common property known as the same number of valence electrons. Valence electrons are the electrons in the outermost energy level of an atom and are involved in the formation of chemical bonds. In the representative elements series, also known as the main group elements, the columns represent different groups with similar properties due to the same number of valence electrons. These common properties can include similar chemical reactivity, bonding behavior, and the ability to form specific compounds.
