Question: Samples of two different isotopes have different initial activity. The graph below shows activity - versus - time for both isotopes. At time T the

Samples of two different isotopes have different initial activity. The graph below shows
activity-versus-time for both isotopes. At time T the activity of each sample is the same.
Which sample has a lower number of undecayed nuclei N at time T?
(a) The sample of isotope A
(b) The sample of isotope B
(c) Both samples have the same number of nuclei
Samples of two different isotopes have different initial activity. The graph

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