2. Atoms & Elements
Atomic Mass
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ANSWERS OPTIONS
A
206.89 u
B
207.01 u
C
207.22 u
D
208.15 u
Lead has four stable isotopes (listed with their atomic mass and abundance, respectively): 204Pb (203.9730 u, 1.4%), 206Pb (205.9745 u, 24.1%), 207Pb (206.9759 u, 22.1%), and 208Pb (207.9767 u, 52.4%). Calculate the atomic mass of lead.