Which ion represents Iron in its +2 oxidation state?

Iron exists in multiple oxidation states, with the +2 oxidation state being one of the most common forms. The representation of an ion indicates its charge; in this case, Fe(2+) signifies that the iron atom has lost two electrons, resulting in a positively charged ion. This +2 charge is characteristic of iron(II), which is the nomenclature used for the iron ion in this oxidation state.

Understanding ion charges is crucial for determining the oxidation state of an element. In contrast, Fe(3+) reflects iron in a +3 oxidation state, Fe(4+) suggests a +4 state, and Fe(+) would imply a +1 state, which do not represent the +2 oxidation state accurately. Thus, Fe(2+) is the correct choice that appropriately indicates iron in its +2 oxidation state.