What is the approximate half-life of Cadmium 109?

Cadmium 109, a radioactive isotope of cadmium, has a half-life of approximately 462 days, which is roughly equivalent to 15 months. The half-life is the time taken for half of the radioactive atoms in a sample to decay, which is critical for understanding its behavior in both environmental and health contexts. Knowing the half-life helps in assessing the risks associated with exposure as well as the timeframe for which cadmium will remain in a given environment before it reduces to half of its initial radioactive potency. This information is essential for both lead risk assessment and broader toxicological considerations, assisting professionals in making informed decisions regarding safety measures and remediation efforts.

The other options reflect different durations which do not accurately correspond to Cadmium 109's half-life. Understanding the scientific principles behind radioactive decay is crucial for professionals in the field to effectively manage and mitigate risks associated with exposure to radioactive materials.