Beim natürlichen Zerfall von Uran entsteht unter anderem Radium und daraus Radon.
Radonatome können weiter zerfallen.Es entstehen Polonium, Wismuth und Blei.
www.bag.admin.chThe natural decay of uranium gives rise to products including radium and radon.
Radon gas atoms can in turn disintegrate, producing polonium, bismuth and lead.
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