Polonium-210 has a half-life of 140 days

PHYSICS · Single correct · CBSE · Physics · Nuclei · Nuclei

Problem

3. Polonium-210 has a half-life of 140 days. It decays exponentially, where rate of decay is proportional to the amount at the time

t

. If we start with 100 g , how much will remain after 10 weeks? (A) 50 (B) 71 (C) 90 (D) 280