²¹⁰Pb Has a Half- Life of 22

²¹⁰Pb has a half- life of 22.3 years and decays to produce ²⁰⁶Hg. If you start with 7.50 g of ²¹⁰Pb, how many grams of ²⁰⁶Hg will you have after 17.5 years?

A) 0.0600
B) 3.09
C) 1.71
D) 3.15
E) 4.35