What is rubidium-82 half-life?

Rubidium-82 (82Rb) has a half-life of 75 seconds. This means that after 75 seconds, half of the initial amount of 82Rb will have decayed into stable strontium-82. This radioactive isotope is commonly used in medical imaging procedures, specifically positron emission tomography (PET) scans of the heart. It is preferred over other radioisotopes as it has a relatively short half-life, minimizing radiation exposure to the patient.