Manganese atoms can form a wide variety of ions, including Mn2+, Mn3+ and Mn4+. Propose how we can communicate which ion is present in a compound
When writing the name of an ionic compound with a transition element, its charge is written in roman numerals in parentheses. For example, an ionic compound of Mn2+ and oxygen would be manganese (II) oxide, MnO. A compound of Mn3+ would be manganese (III) oxide and would have the chemical formula Mn2O3. If you’re looking only at the chemical formula, usually you can determine the charge on the transition element if you know the charge on the anion. For example, if you have MnCl2, you know that Cl carries a -1 charge, so the Mn must have a +2 charge in order to produce a neutral ionic compound.