W
hen covalent bonds are broken and reformed,a polyatomic ion may rearrange to monatomic Cation.
eduction has taken place!
Four Covalent Bonds in the Permangate Ion are broken when attacked by eight Hydrogen Ions to form Four Water Molecules, but the metallic ion, Manganese, gains 5 electrons from the accompanying oxudation to establish the manganese central atom as the Manganese II (Manganous) 2+ ion.