Chapter 1 - Solutions

The percentages in parentheses denote the relative abundances. Average mass = (0.7553)(34.968 amu) + (0.2447)(36.956 amu) = 35.45 amu. 46) The atomic mass of 203Tl and 205Tl are 202.972320 amu and 204.974401 amu, respectively. Calculate the natural abundances of these two isotopes. The average atomic mass of thallium is 204.4 amu. ................
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