Question

what do you mean my ATOMIC MASS​

Answer 1

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An atomic mass (symbol: ma) is themass of a single atom of a chemical element.

Answer 2

Atomic mass:

An atomic mass (symbol: ma) is the mass of a single atom of a chemical element. It includes the masses of the 3 subatomic particles that make up an atom: protons, neutrons and electrons. 1 atomic mass unit is defined as 1/12 of the mass of a single carbon-12 atom.