# 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%?

Jan 21, 2016

$\left(50 \times 0.0434 + 52 \times 0.8379 + 53 \times 0.095 + 54 \times 0.0237\right) g \cdot m o {l}^{-} 1$ $=$ ??
The final answer should be close to $52$ $g \cdot m o {l}^{-} 1$ because ""^52Cr is the most abundant isotope.