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%#?
The average atomic mass is simply the weighted average of the individual isotopic masses.
So let us take the weighted average of your isotopes:
The final answer should be close to