Radioactive decay is a phenomenon that revolutionised our understanding of atomic physics.
A list of words is provided below.
Underline the word that best describes the nature of radioactive decay.
Predictable |
Infinite |
Random |
Dangerous |
The isotope Lanthanum–138 has a decay constant of 2.0 × 10–19 s–1.
Calculate the number of nuclei of Lanthanum–138 that would have a measured activity of 40 Bq.
Using the information given in part (c), calculate the half–life of Lanthanum–138 in years.
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