The roman numeral II in the name Iron II indicates that the cation has a +2 charge. This means that the iron ion has lost two electrons, resulting in a positive charge.
Roman numerals are used to represent the charge of the cation in an ionic compound. The Roman numeral is placed in parentheses after the name of the cation to indicate its charge. For example, in Fe(NO3)2, the Fe cation has a +2 charge, so it is written as iron(II).
The symbol of the cation of FeCl2 is Fe2+. A cation is a positively charged ion and to find the formula of any compound you must balance the cations with the anions.
Fe^(2+) its name is the iron cation in oxidation state '2' . When combined, with say a sulphate anion it would be named as 'Ferrous sulphate'. NB Ferric sulphate is iron cation in oxidation state '3'. ( Fe2(SO4)3 ). Note the difference in spelling for different oxidation states.
(MnO4)2- is the chemical formula of manganate ion.
Iron(III)nitride
Iron(II) indicates that the cation is Fe2+. The (II) indicates the oxidation number of iron in this case it has lost 2 electrons. ( OILRIG -oxidation is loss (of electrons), reduction is gain).
Roman numerals are used to represent the charge of the cation in an ionic compound. The Roman numeral is placed in parentheses after the name of the cation to indicate its charge. For example, in Fe(NO3)2, the Fe cation has a +2 charge, so it is written as iron(II).
The symbol of the cation of FeCl2 is Fe2+. A cation is a positively charged ion and to find the formula of any compound you must balance the cations with the anions.
Fe^(2+) its name is the iron cation in oxidation state '2' . When combined, with say a sulphate anion it would be named as 'Ferrous sulphate'. NB Ferric sulphate is iron cation in oxidation state '3'. ( Fe2(SO4)3 ). Note the difference in spelling for different oxidation states.
When a cation has more than one possible ionic charge you use either just the number (i.e. 2+) if it is in ion form or a roman numeral (II) in a name.
In a reaction between iron and copper (II) chloride, an ionic bond is formed. The iron atom donates electrons to the copper (II) cation, resulting in the formation of Fe^2+ cation and CuCl2^− anion.
It is the iron(II) cation. The Fe atom loses two electrons to become doubly positively charged Fe2+ cation. Some of the compounds it might form are FeSO4 and FeCl2.
(MnO4)2- is the chemical formula of manganate ion.
Iron(III)nitride
These formulas are: for iron (II), FeO, FeS, and FeCl2; and for iron (III), Fe2O3, Fe2S3, and FeCl3.
It is Iron-(II)-bromine
Pt(2+) is a cation of Pt(II).