Question A6 The uranium decay series from U-238 to stable lead (Pb-206) is: 238 U → 234Th → 234 Pa + 234 U → 230 Th → Ra

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Question A6 The Uranium Decay Series From U 238 To Stable Lead Pb 206 Is 238 U 234th 234 Pa 234 U 230 Th Ra 1 (283.64 KiB) Viewed 70 times

Question A6 The uranium decay series from U-238 to stable lead (Pb-206) is: 238 U → 234Th → 234 Pa + 234 U → 230 Th → Ra → 232Rn +248 Th + 224 Pb + 334Bi → 34 Po 226 88 214 83 92 90 92 90 86 82 84 +32Pb + Bi + Po → 29Pb 26 82 82 83 84 U-238 has a half-life of 4.5 billion years. Of the other nuclei on the way from U-238 to stable Pb- 206, most are very short-lived (half-lives less than a few months). The exception is radium, with a half-life of 1600 years. Marie Curie was given ten tonnes of pitchblende (uranium ore, mostly uranium oxide) and after several years of chemical processing and purification she isolated some radium from it. Estimate how much radium there was in the pitchblende for her to extract.