Complete these sentences by selecting the correct answers from the drop-down menus. after one half- % of the atoms will change to a stable isotope and__ % will remain radioactive. after three half- % of the atoms will change to a stable isotope and__ % will remain radioactive. -12.5 -25 -50 -75 -87.5 me i can't quiet figure it out hehe i'll give you 25 points