Radium‑226226 (atomic mass = 226.025402 amu226.025402 amu) undergoes α‑decay to form radon‑224.224. The half‑life of this process is 1.60×103 years.1.60×103 years. Determine the volume of radon gas (at 25 ∘C25 ∘C and 1.00 atm1.00 atm) that is produced from the decay of 26.7 g26.7 g of radium-226 in 50.7 days.

How many α and β particles are emitted when U 238/92 decays to Po 218/ 84?

Based on Plutonium's half-life, why is it so hard to dispose of?

Hh.32.

Radioactive decay can be described by the following equation In A = In A, – kt where Ao is the original amout of the substance, A is the amount of the substance remaining after time t, and k is a constant that is characteristic of the substance. For the radioactive isotope strontium-90, k is 2.47 x 10-2 yеars If the original amount of strontium-90 in a sample is 56.5 mg, how much strontium-90 remains after 23.7 years have passed? mg

The radioisotope 41Ar decays by β-(negative beta) emission to an excited levelof 41K that is 1.293 MeV above ground state. What is the maximum kinetic energy of the emitted β-particle?

The actinium decay series begins with uranium-235 and ends with lead-207. The first 5 steps involve the successive emission of α,β,α,β,α. Identify the radioactive isotope produced in each of the steps.

Calculate the number of collisions required to slow a neutron from an energy of 2 MeV to a thermal energy of 0.025 eV using water as a moderator. Perform the same calculation for heavy water (D2O) and carbon.

A 1.00 L sample of water near a nuclear plant registered a 2.55 pCi of iodine–131. What is the concentration of iodine–131 is dissolved in the sample (in parts per million), given that the half – life of iodine–131 is 8 days, and its isotopic mass is 130.9061246 g/mol?

Q2(B). Prove that it would take 17.6 years if an old sample of 10 g Co-60 with a half-life of 5.3 years now decayed to 1 g.