what is atomic mass? explain?
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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. 1 u has a value of 1.660538921(73) × 10−27 kg
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Atomic mass is typically calculated by adding the number of protons and neutrons together, ignoring the electrons because of their small size.
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