Respuesta :
The relative atomic mass of thallium is 204.4 amu
Given,
Thallium -205 = 70%
Thallium -203 = 30%
We have to find the relative atomic mass of thallium.
Thallium is used in semiconductors and for infrared instruments. Thallium and its compounds are very toxic and cause multi-organ involvement.
Relative atomic mass is the comparison of 1/12th the mass of one carbon atom. It is a method of comparing atomic masses, therefore it lacks a unit.
Relative atomic mass = (30 × 203 + 70 × 205)/100
Relative atomic mass = 20440/100
Relative atomic mass = 204.4 amu
Hence the relative atomic mass of thallium is 204.4 amu
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