Using the information in the table to the right, calculate the average atomic mass of strontium. Report to two decimal places.
A 3-column table with 4 rows titled Strontium. Column 1 is labeled Isotope with entries upper S 4 84, upper S r 86, upper S r 87, upper S r 88. Column 2 is labeled Mass in atomic mass units with entries 83.913428, 85.909273, 86.908902, 87.905625. Column 3 is labeled abundance with entries 0.56 percent, 9.86 percent, 7.00 percent, 82.58 percent.
