Atomic mass unit

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An atomic mass unit is a unit of measurement that is used to measure the mass of atoms. The atomic mass unit (abbreviated: amu or u) is roughly equal to the mass of 1 proton or 1 neutron. This helps people measure atoms today

The unified atomic mass unit and the dalton are different names for the same thing. The dalton name is used more over time.[1][2][3] The unit is named after John Dalton, an 18th-century naturalist and teacher.

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