The half life of 24Na is 15.0hr . how long does it take for 80 percent of a sample nuclide to decay

Answer 1

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.