The isotope nitrogen-13 has a half-life of 10 min. A sample initially contains 8.0 × 10¹⁰ undecayed nuclei.
a. Write down an equation to show how the number undecayed N depends on time t.
b. Calculate how many undecayed nuclei will remain after 10 min, and after 20 min.
c. Determine how many nuclei will decay during the first 30 min.

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Given Half life Initial undecayed ni cdei N 10 min 07 8 x 10 The ex... View the full answer