The half-life of Tl-201 is 3.0 days. How many days will it take until the activity of the Tl-201 in Simone’s body is one-fourth of the initial activity?   Express your answer using two significant figures.

a) Mrs. Price's son, Liam is currently working as a boilermaker at the Darlington Nuclear Power plant. He is working with Uranium-237 which has a half-life of 13.75 days. What mass of an initial sample of 567.5g of uranium-237 would remain after 56 days? b) Write the complete reaction for the decay of Po-210 if it undergoes 2 consecutive alpha decay followed by a beta decay followed by another alpha decay.

What is the activity (in Bq) of a sample of Cs-137 if 12.1 years ago it was recorded to have an activity of 5499.9 Bq.

The easiest fusion reaction to initiate is 2₁H + ³H → ₂He + ¹on Calculate the energy released, in kJ, per nucleus of 42He produced. The masses of the relevant particles are as follows (1 amu = 1.66×10 27 kg): Particle Mass (amu) H 2.01410 3.01605 4.00260 1.00866 5.4858 x 10-4 H He In

The half-life of cesium-129 is 32.0 hours. How much time is required for the activity of a sample of cesium-129 to fall to 13.7 percent of its original value? hrs

The uranium decay series from U-238 to stable lead (Pb-206) is: 238U → 234 Th → 234Pa → 234U → 230 Th → 210Pb → 210Bi → 210PO → 206 Pb Th - Pb → Bi → Po → 226 Ra → 222Rn → 92 90 91 92 88 86 84 83 84 Of the 15 nuclei from U-238 to Pb-206, list those radionuclides that are alpha-particle emitters, and those that are beta-particle emitters. State your reasons.

A freshly prepared sample of radioactive nuclide undergoes 3312 disintegrations per second. After 10.0 yr, the activity of the sample declines to 2437 disintegrations per second. What is the half-life of this nuclide?