A geological sample is found to have a pb-206u-238 mass, Ask an Expert

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A geological sample is found to have a Pb-206/U-238 mass ratio of 0.773/1.00. Assuming there was no Pb-206 present when the sample was formed, how old is it? The half-life of U-238 is 4.5 × 109 years.

3.98 × 109 years

1.4 × 1010 years

2.1 × 109 years

7.3 × 1011 years

2.4 × 1010 years

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Category:- Chemistry
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