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)
Transition metals that can form more than one type of ion are distinguished by using Roman numerals in parentheses after the metal's name in the compound's formula. For example, in iron(II) chloride (FeCl₂), the Roman numeral II indicates that iron has a +2 charge, while in iron(III) chloride (FeCl₃), the Roman numeral III indicates a +3 charge. This notation helps clarify the specific oxidation state of the metal ion in the compound.
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).
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.
When naming compounds that include transition metals, a Roman numeral is used to indicate the oxidation state or charge of the metal ion. This is necessary because transition metals can have multiple oxidation states, and the Roman numeral helps to specify which one is present in the compound. For example, in iron(III) chloride, the Roman numeral III indicates that iron has a +3 charge. This distinction is crucial for accurately conveying the compound's chemical composition and properties.
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.
Roman numerals are used to indicate oxidation states.
The oxidation state of a transition metal in a compound is indicated by a Roman numeral in parentheses after the metal's name. For example, in FeCl3, iron is in the +3 oxidation state, so the compound is named iron(III) chloride. The Roman numeral helps identify the charge on the transition metal ion.
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
A roman numeral in parentheses follows the name of the metal... apex
Transition metals that can form more than one type of ion are distinguished by using Roman numerals in parentheses after the metal's name in the compound's formula. For example, in iron(II) chloride (FeCl₂), the Roman numeral II indicates that iron has a +2 charge, while in iron(III) chloride (FeCl₃), the Roman numeral III indicates a +3 charge. This notation helps clarify the specific oxidation state of the metal ion in the compound.
Roman Numeral
Roman numerals are used in naming certain ionic compounds to indicate the charge of the transition metal ion when a transition metal can have multiple oxidation states. This helps distinguish between different compounds with the same elements but different charges, ensuring clarity and specificity in naming.