Meaning & use
AMU
Last updated
A unit of mass used to express the masses of atoms and molecules, defined as one twelfth the mass of a carbon-12 atom.
See it in a sentence
The atomic mass of oxygen is approximately 16 amu.
Chemists convert amu to grams using Avogadro's number when calculating molar mass.
A note on using this word
AMU stands for 'atomic mass unit'; the modern SI-recognized equivalent unit is the dalton (Da).
Words with a similar meaning
dalton
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