Question

Define the atomic mass?​

Answer 1

Answer:

The atomic mass is the mass of an atom. Although the SI unit of mass is kilogram, the atomic mass is often expressed in the non-SI unit dalton where 1 dalton is defined as ¹⁄₁₂ of the mass of a single carbon-12 atom, at rest.

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Answer 2

Answer:

Atomic mass of an atom is the sum of protons and neutrons in an atom.

For example, nitrogen has 7 protons and 7 neutrons

so, the mass of nitrogen is 14 u .