Valence electrons: For main group elements (i.e s-block and p-block elements), the valence electrons are the electrons present in the outermost orbit. But for most of the transition and inner transition elements, the valence electrons are the electrons present in the shells outside the noble gas core. How do you find the valency of chlorine, sulphur and magnesium?. Ans: Hint: Try to recall that chlorine is an element of group 17, sulphur is an element of group 16 and magnesium is an element of group 2 of modern periodic table.Complete step by step... Since the atom has 2 valence ... This table of element valences includes the maximum valence and most common valence values in chemistry. Use this for reference with a periodic table.
