Statement 1 : The standard unit for expressing the mass of atom is amu.

Statement 2 : amu is also called avogram.

 Atomic mass is very less because atoms are very small

Hence atomic mass can explained relative to ${\mathrm{C}}^{12}$ isotope

the mass of  ${\mathrm{C}}^{12}$ isotope is assigned as 12amu and masses of all other atoms are given relative to this standard 1amu

Both statement 1 and statement 2 are correct