See also: Ferric cation (has active moiety) Ferric Oxide Red Zinc. It is one of the three main oxides of iron, the other two being iron (II) oxide (FeO) the rarer form, and iron (II,III) oxide (Fe3O4) which naturally as magnetite. An element symbol without a charge written next to it is assumed to be the uncharged atom. Iron (III) oxide or ferric oxide is the inorganic compound with the formula Fe2O3. If the charge is a single positive or negative one, the number 1 is not written if the magnitude of the charge is greater than 1, then the number is written before the + or − sign. The magnitude of the charge is listed as a right superscript next to the symbol of the element. Note the convention for indicating an ion. Unfortunately, there is little understanding which two charges a metal atom may take, so it is best to just memorize the possible charges a particular element can have. Cobalt (Co) is another element that can form more than one possible charged ion (2+ and 3+), while lead (Pb) can form 2+ or 4+ cations. For example, iron (Fe) atoms can form 2+ cations or 3+ cations. A few elements, all metals, can form more than one possible charge. Examination of the table in the link given shows that there are some exceptions to the previous point. The respective oxidation states of S and O are +6 and -2. FAQs What is the charge of Fe in FeSO 4 The charge of Fe in FeSO 4 is +2. A more complete table of ions and their charges can be found at Monotomic Ions of Various Charges. Why does iron have a +3 charge When iron loses three electrons, it gains a +3 charge. \) is helpful in determining the charge on a large number of our cations and anions it's hardly complete.
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