Half life problems11/28/2023 ![]() ![]() Naturally occurring uranium isotopes mass numberĭetermine the age of the Earth using Rutherford's method and contemporary data, then compare your results with the currently accepted value of 4.55 × 10 9 years and discuss. Given this, he made the first radioisotopic calculation of the age of the Earth in 1929. The reason we see less 235U and more 238U today is because the former decays faster than the latter. ![]() ![]() He assumed that the two most common isotopes were originally found in equal abundance on Earth.
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