Molten lead bromide contains lead(II) cations (Pb²⁺) and bromide anions (Br⁻). When solid PbBr₂ melts, the ionic lattice breaks down and the ions become mobile, allowing the liquid to conduct electricity. The ions are solvated or surrounded by other ions in the molten state, though they lack the structured hydration shell that would form in aqueous solution. The molar ratio of Pb²⁺ to Br⁻ remains 1:2, consistent with the compound's formula. No molecular PbBr₂ units or other species form significantly in the melt under normal conditions. This ionic composition is why molten lead bromide conducts electric current—the mobile cations and anions can carry charge through the liquid. During electrolysis of molten PbBr₂, Pb²⁺ ions migrate to the cathode where they gain electrons to form metallic lead, while Br⁻ ions migrate to the anode where they lose electrons to form bromine gas, demonstrating the presence and reactivity of these two ion types.