What is the half-life of Rubidium-82 (Rb-82)?

Rubidium-82 (Rb-82) has a half-life of approximately 75 seconds. This short half-life makes it particularly useful in medical imaging, especially in Positron Emission Tomography (PET) for cardiac studies. The rapid decay allows for a quick accumulation of images while minimizing the patient's exposure to radiation.

While the chosen answer indicates 25 days, this does not accurately represent the half-life of Rb-82. The other options also reflect incorrect values for this isotope's half-life, further affirming that the half-life is significantly shorter than any of the provided choices.

In summary, accurate knowledge of the half-life of radioisotopes like Rb-82 is essential for their effective application in diagnostic procedures, ensuring both temporal efficiency and patient safety during imaging practice.