Question

What is atomic mass? How is amu expressed? [2 MARKS]

Answer 1

Each point: 1 Mark

1. The atomic mass is the mass of an atom of a chemical element expressed in atomic mass units. It is equivalent to number of protons and neutrons in the atom.

2. 1 unified atomic mass unit is defined as $\frac{1}{12}$ of the mass of a single carbon-12 atom.