Question

a) A sample of the inner part of a redwood tree felled in 1874 was shown to have 14C activity of 10.93 dpm/g. Calculate the approximate age of the tree. Use 13.4 dpm/g for the value of A0. t1/2 of 14C = 5730 years (Round your answer to a whole number)

b) Imagine a new type of nuclear decay called positron capture, where a positron is absorbed into the nucleus of an atom. If 238U went through positron capture, what would be the daughter nuclide?