Using the half-life formula, we can find the amount of time it takes for 80 percent of the sample nuclide to decay:
t = (t1/2) x log(0.2)/log(0.5)
t = (15.0hr) x log(0.2)/log(0.5)
t = (15.0hr) x 2.32
t = 34.8 hours
Therefore, it takes 34.8 hours for 80 percent of a sample nuclide of 24Na to decay.
The half life of 24Na is 15.0hr . how long does it take for 80 percent of a sample nuclide to decay
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