An element consists of 0.19% of an isotope with mass 135.907

Last updated: 7/27/2022

An element consists of 0.19% of an isotope with mass 135.907 u, 0.25% of an isotope with mass 137.9060 u, 88.45% of an isotope with mass 139.9054 u, and 11.11% of an isotope with mass 141.9092 u. Calculate the average atomic mass, and identify the element.