Here's why:

* Electron Configuration: Polonium has an electron configuration of [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁴. This means it has 6 valence electrons.

* Tendency to Lose Electrons: Elements with 4-7 valence electrons generally tend to gain electrons to achieve a stable octet (8 valence electrons). However, polonium is a metalloid, and metalloids tend to behave like metals.

* Metallic Character: Metals have a tendency to lose electrons to form positive ions (cations). This is because they have relatively low ionization energies (energy required to remove an electron).

Therefore, polonium is more likely to lose electrons to form cations, such as Po²⁺ or Po⁴⁺, rather than gain electrons to form anions.