# What is the atomic mass of barium due to?

Jan 2, 2018

Atomic mass of barium is around $137.327 u \approx 2.28 \cdot {10}^{-} 22 g$
The average of all barium isotopes' mass rounds up to 137.327 u.
$1 u \approx 1.66 \cdot {10}^{-} 24 g$
Therefore, the atomic mass of barium is $137.327 \cdot 1.66 \cdot {10}^{-} 24 = 2.28 \cdot {10}^{-} 22 g$