Practice Problem: Method 1 There are five (5) naturally occurring isotopes of nickel: Isotope Mass (amu) Relative Abundance (%) nickel-58: 57.9353 67.84 nickel-60: 58.9332 26.23 nickel-61: 60.9310 1.19 nickel-62: 61.9283 3.66 nickel-64: 63.9280 1.08 Calculate the average atomic mass of nickel:
