You can just calculate how much Tc99m has an acitivity of 30 Bq, and then use the equation to calculate how much Mo you need six hours earlier. The only thing not accounted for in the equation is the yield of 85% Tc99m.Benlaww said:
Nuclear decay is the process by which an unstable atomic nucleus loses energy by emitting radiation, resulting in the formation of a more stable nucleus.
The three main types of nuclear decay are alpha decay, beta decay, and gamma decay. In alpha decay, an alpha particle (consisting of two protons and two neutrons) is emitted from the nucleus. In beta decay, a beta particle (either an electron or a positron) is emitted from the nucleus. In gamma decay, a high-energy photon is emitted from the nucleus.
A nuclear decay scheme is a graphical representation of the sequence of nuclear decays that occur in a radioactive sample. It shows the type of decay, the energy of the emitted particle or photon, and the resulting nucleus at each step.
The stability of a nucleus is determined by the ratio of protons to neutrons. If this ratio is too high or too low, the nucleus will be unstable and undergo nuclear decay in order to reach a more stable state. This is known as the neutron-to-proton ratio.
Understanding nuclear decay is important for a variety of reasons. It helps us understand the behavior of radioactive materials and their potential effects on the environment and human health. It is also crucial in fields such as nuclear energy, nuclear medicine, and carbon dating. Additionally, studying nuclear decay can provide insights into the fundamental forces and processes that govern the behavior of matter at the atomic level.