Answer:
the activity of thallium is 1.54 kBq .
Explanation:
given,
half life = 3.7 years
R₀ = 10 kBq
time = 10 years
[tex]R = R_0\times e^(\dfrac{-0.693}{t_{1/2}}\times t)[/tex]
[tex]R = 10\times e^(\dfrac{-0.693}{3.7}\times 10)[/tex]
R = 10 × (0.153667)
R = 1.5367 ≈ 1.54 kBq
hence, the activity of thallium is 1.54 kBq .
