Would not be meaningful in this formula. Zinc is only bivalent.
Roman numerals are used to indicate oxidation states.
as roman numerals ex: Fe2+ is iron (II)
roman numerals are used to indicate oxidation states (APEX)
If you are referring to GROUP NUMBER when you say "Roman numeral above the group", it tells you the number of valence electrons, or the number of outermost electrons, with transition metals being the exception. For group number XII - XVIII the number of valence electrons is the group number minus 10 (minus 10 for the 10 transition groups).
formula?
Compounds which contain transition elements. cu2so4
we usually use roman numerals in writing names of compounds of transitional elements which have more than one valency . for example we have two compounds of iron chloride , iron(II)chloride and iron(III)chloride depending on the valency of iron in each compound.
Roman numerals are used to indicate oxidation states.
Numbers are used to indicate the valency of the metal in the compound. By convention Roman numerals are used so that the number isn't mistakenly confused with the numbers present in the formula.
A roman numeral in parentheses follows the name of the metal... apex
as roman numerals ex: Fe2+ is iron (II)
Numbers are used to indicate the valency of the metal in the compound. By convention Roman numerals are used so that the number isn't mistakenly confused with the numbers present in the formula.Read more: Why_is_Roman_numerals_used_in_the_names_of_compounds_that_contain_transition_metals
Roman numerals are used to indicate oxidation states. Apex
Roman numerals are used to indicate oxidation states.
Roman Numeral
roman numerals are used to indicate oxidation states (APEX)
Roman Numeral