Chapter 1, Problem 20P

More than half of all the atoms in naturally occurring zirconium are ${}^{\text{9}0}\text{Zr}$ . The other four stable isotopes of zirconium have the following relative atomic masses and abundances:

Compute the relative atomic mass of ${}^{\text{9}0}\text{Zr}$ to four significant digits, using the tabulated relative atomic mass 91.224 for natural zirconium.