Question

1. Modern basis of relative atomic mass is
​

Answer 1

Hello!!✨

➡Thus, the atomic mass measured in u has nearly the same value as the mass number. When divided by unified atomic mass units, or daltons (abbr. Da), to form a pure numeric ratio, the atomic mass of an atom becomes a dimensionless value called the relative isotopic mass (see section below).✨

❤HOPE it helps to you!!❤