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There аre three nаturаl isоtоpes fоr element L (L- 124, L-126, and L-127). Below are the atomic masses and percent abundances of element L. Determine the average atomic mass of the element. L-124 123.9992 amu 22.101% L-126 125.9909 amu 10.710% L-127 126.9871 amu 67.189%