1. Estimate the initial activity of 1.00 g of polonium-210. The half-life of polonium-210 is 138 days.
(1) Estimate the initial activity of 1.00 g of polonium-210. The half-life of polonium-210 is 138 days.
(2) Polonium-210 decays into lead-206 by alpha decay. Estimate the mass of lead produced after 31 days.