Correct option is D
Correct answer is D
Explanation
Starting from a sample of pure radioactive element A, N = N0 exp(-λt)
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Question
A radioactive element A. Starting from a sample of pure element A, which one of the following graphs correctly shows the number of A atoms N_A with time t? T is the half-life of element A.
A.
B.
C.
D.
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