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25 May, 06:53

Iridium has two isotopes, 191Ir and 193Ir. If 193Ir is found in abundance of 62%, estimate which mass number the average atomic mass will be closest to.

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  1. 25 May, 07:12
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    191Ir = 38% 193Ir = 62%

    Mass number is determined by periodic table and if we take the atomic mass average of the two we can see that the one with more naturally occuring has the closest atomic mass
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