Don't send link please give full solution. Q.23. A radioactive isotope has a half life of 10 days. If today 125 mg is left over, what was its original weight 40 days earlier? 1) 2 g 2) 600 mg 3) 1 g 4) 1.5 g Share with your friends Share 0 Akansha Chauhan answered this Dear Student, 1 View Full Answer