The element chromium has four naturally occurring isotopes. What is the average atomic mass of chromium, using $""^50Cr=4.34%, ""^52Cr=83.79%, ""^53Cr=9.50%, ""^54Cr=2.37%$?

Md Ariful Islam

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Md Ariful Islam

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So let us take the weighted average of your :

$(50xx0.0434 + 52xx0.8379+53xx0.095+54xx0.0237)g*mol^-1$ $=$ $??$

The final answer should be close to $52$ $g*mol^-1$ because $""^52Cr$ is the most abundant isotope.

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