This indication is in parenthesis, with Latin numerals: Fe(II), Fe(III).
Because transition metals can assume more than one charge, the transition metal ion is named by using a Roman numeral
Transition metals form more than one ionic charge; Roman numerals (in parentheses) follow the ion's name. Cu2+ is copper (II) ion.
roman numeral
Roman numerals are used: I, II, III.
Roman numeral following the name shows the ions charge. For example Fe(II) in a compound name means that the iron is present as Fe2+ and Fe(III) in a name means that it is present as Fe3+ The same convention is used for all metals that can have more than one charge, not just transition metals for example thallium (I) and thallium (III) (thallium is in group 13)
Because transition metals can assume more than one charge, the transition metal ion is named by using a Roman numeral
Transition metals form more than one ionic charge; Roman numerals (in parentheses) follow the ion's name. Cu2+ is copper (II) ion.
roman numeral
Roman numerals are used: I, II, III.
Roman numerals are used: I, II, III.
stocksystem
Roman Numeral
Roman numeral following the name shows the ions charge. For example Fe(II) in a compound name means that the iron is present as Fe2+ and Fe(III) in a name means that it is present as Fe3+ The same convention is used for all metals that can have more than one charge, not just transition metals for example thallium (I) and thallium (III) (thallium is in group 13)
Since these compounds include metals, it is automatically ionic. Since it is ionic, the names are determined by simply setting the names of the ions together. Since many of the transition metals have different charges, the latin form of that metal is used, with a suffix changing with the strenght of the metallic ion. -ous refers to a weaker charge than -ic For example: Cupric oxide has Cu with a charge of 2+ and Oxygen with a charge of 2- whilte Cuprous oxide has 2 Cu atoms with a charge of 1+ and 1 Oxygen atom with a charge of 2- Alternatively, You can write the metals English name with the charge in parentheses, like thus: Copper (II) Oxide
When naming a transition metal ion that can have more than one common ionic charge, the numerical value of charge is indicated by either (i) the charge number in capital Roman numerals within parentheses after the cation name or (ii) a distinct form of the cation name, ending in "ic" for the higher ionic charge or "ous" for the lower ionic charge. Method (i) is usually preferred now, but method (ii) was often used fifty years ago and is sometimes still used.
In modern naming they are group 13 through group 18 or in the older system they are 3A through 8A.
When naming ionic compounds, the non metals' ending is changed to "-ide". "Ionic bonds" do not have particular names.