Manganese can exist in which of the following oxidation states?

Manganese is a transition metal known for its ability to exhibit multiple oxidation states. Its electronic configuration, [Ar] 4s² 3d⁵, allows it to lose electrons from both the 4s and 3d orbitals, resulting in various oxidation states.

The oxidation states of manganese that are common in various compounds include +2, +3, +4, +5, +6, and +7. In option B, Mn(2+) and Mn(3+) are both valid oxidation states that manganese can adopt. When manganese loses two electrons, it achieves the +2 oxidation state, which is very stable and commonly found in compounds such as manganese(II) oxide (MnO) and manganese(II) sulfate (MnSO₄). Additionally, the +3 oxidation state is also feasible, where manganese loses three electrons, found in compounds like manganese(III) chloride (MnCl₃).

This choice accurately reflects two of the common oxidation states of manganese, illustrating the metal's versatility in forming different coordination complexes and compounds in varying oxidation states. The presence of Mn in both the +2 and +3 states is well-documented and aligns with manganese's known chemistry.