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There is no isotope of Uranium 206 - Uranium 217 is the lightest.

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Q: What is the age of a meteor with half being uranium 238 half being uranium 206?
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What element is the final nonradioactive decay of product of uranium?

Lead 206 (Pb)


How many α-particles will be generated during the decay of a uranium-238 atom to Pb 206?

See the link below for the decay chain of uranium-238.


What element is the great great granddaughter of U-238?

Radium 226 would be the great great granddaughter of Uranium 238.Uranium 238 decays to Thorium 234 with a half-life of 4.5 billion years.Thorium 234 decays to Protactinium 234 with a half-life of 24 days. (child)Protactinium 234 decays to Uranium 234 with a half-life of 1.2 minutes. (granddaughter)Uranium 234 decays to Thorium 230 with a half-life of 240,000 years. (great granddaughter)Thorium 230 decays to Radium 226 with a half-life of 75,000 years. Radium 226 has a half-life of 1600 years.Subsequent decay products are:Radon 222 (half-life = 38 days)Polonium 218 (half-life = 3.1 minutes)Lead 214 (half-life = 27 minutes)Bismuth 214 (half-life = 20 minutes)Polonium 214 (half-life = 160 microseconds)Lead 210 (half-life = 22 years)Bismuth 210 (half-life = 5 days)Polonium 210 (half-life = 138 days)Lead 206 (stable - does not decay further)


What isotopes accumulate in old uranium-bearing rock?

Ultimately lead, as it is the only element in the uranium decay chains with isotopes that are stable. Specifically the isotopes 206, 207, and 208; each of which is the end of a different decay chain.


Is Pb-206 radioactive?

Yep! It is the last product in the chain of decay of Radium and Uranium series. There are a lot of nasty products that they decay into before becoming lead-206 (which takes about 4.5 billion years) but once there, the final product: "lead-206" should not give you cancer as it is stable (non-radioactive). Don't eat it of course because it's still poisonous (chemically).