Final answer:
The half-life of sodium fluoride F18 (fluorine-18) is approximately 1.8283 hours, which is closest to option A, 4 hours.
The correct answer is none of all.
Step-by-step explanation:
The half-life of sodium fluoride F18, commonly known as fluorine-18, is 109.7 minutes. When you are asked to find the half-life in hours, you need to convert minutes to hours. Hence, 109.7 minutes is approximately 1.8283 hours.
The half-life of fluorine-18 (F-18) is approximately 110 minutes. None of the provided options (4 hours, 8 hours, 12 hours, or 24 hours) matches the correct half-life for fluorine-18.