The figure below shows the mass spectrum of lead as obtained from the mass spectrometer:
a) Calculate the relative atomic mass of lead.
b) State and explain the number of isotopes in natural lead.
1
Expert's answer
2017-07-05T09:22:07-0400
The relative atomic mass is worked out using the following formula, illustrated for two isotopes, where the abundances are given in percentage values. A_r=((mass1 x abundance 1)+(mass2 x abundance2)+⋯)/100 Natural lead consists of four stable isotopes with mass numbers of 204, 206, 207, and 208, and traces of five short-lived radioisotopes.
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