What Does the Roman Numeral Represent in a Chemical Name
They are used in situations where the multiple oxidation states are available to the metal. For example iron can form two common ions Fe2 and Fe3. Inorganic Chemistry Groups Of The Periodic Table Chemistry Stack Exchange All metals except Al Zn and those in Groups 1 and 2 can have more than one oxidation number. . Lead is in Group 4 so we. Roman numerals numbers are sometimes used in formula eg. Group IIA elements have two valence electrons and so forth. The Roman numerals on a periodic table of elements define the chemical group of the elements in that column and identify the number of valence electrons of each element. Group IA elements have one valence electron. When we name their compounds we have to specify which oxidation number is involved. In chemistry nomenclature writing names systematically Roman numerals are used for a specific group of elements. 1 Answer Ernest Z. So for example if we have som