Absolute mass formula-Class IX

Absolute mass or Actual atomic mass:

It is found that, the actual atomic mass of a carbon-12 atom is equal to $1.9926\times {10}^{-23}$g.

$\therefore 1u=\frac{1.9926\times {10}^{-23}}{12}g$

$\Rightarrow 1u=1.6605\times {10}^{-24}g$

Thus by multiplying the relative atomic mass with 1.6605 × 10-24g we can get the absolute or actual mass of an atom.