nadine2546 nadine2546 19-05-2023 SAT contestada A 60. 0-g sample of fermium-253 was placed in a sealed vessel 9. 0 days ago. Only 7. 5 g of this isotope is now left. What is the half-life of fermium-253? 3. 0 days 4. 5 days 17. 5 days 20. 0 days.
