Chapter 2, Problem 45QP

The atomic masses of ${}^{\text{204}}\text{Pb }\left(\text{1}\text{.4 percent}\right){\text{.}}^{\text{206}}\text{Pb }\left(\text{24}\text{.1 percent}\right){\text{.}}^{\text{ 207}}\text{Pb }\left(\text{22}\text{.1 percent}\right)\text{,}$ and ${}^{\text{208}}\text{Pb }\left(\text{52}\text{.4 percent}\right)\text{ are 203}\text{.973020, 205}\text{.974440, 206}\text{.975872, and 207}\text{.976627 amu,}$ respectively. Calculate the average atomic mass of lead. The percentages in parentheses denote the relative abundances.