The half-life of the radioactive nucleus 22688Ra is 1.6 x 103 year. If a sample initially contains 3.00 x 1016 nuclei, what is the number of nuclei of the material remaining4.8 x 103 year?

A 3.75x1018

B 3.10x1018

C 3.75x1015

D 3.60x1020

Solution

Correct Answer: Option C

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