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Elements 81-90. Periodic Table. Thallium. Thallium atom. Himalayan Sea Salt. Lead. Lead Atom. Lead Pipe. Bismuth. Bismuth atom. Pepto-Bismol. Polonium. Polonium atom. Antistatic Brush. Astatine. Astatine atom. Uranium Ore. Radon. Radon atom. Radon Gas Detector. Francium.
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