Heaviest element whose common isotope was long thought stable (²⁰⁹Bi actually α-decays with t₁/₂ ≈ 2×10¹⁹ yr). Low-toxicity Pb replacement; Pepto-Bismol.
Heaviest element whose common isotope was long thought stable (²⁰⁹Bi actually α-decays with t₁/₂ ≈ 2×10¹⁹ yr). Low-toxicity Pb replacement; Pepto-Bismol.