atomic mass unit

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Related to atomic mass unit: relative atomic mass, atomic weight

atomic mass unit

n. Abbr. amu

A unit of mass equal to ¹/₁₂ the mass of the most abundant isotope of carbon, carbon-12, which is assigned a mass of 12. Also called dalton.

atomic mass unit

(Units) a unit of mass used to express atomic and molecular weights that is equal to one twelfth of the mass of an atom of carbon-12. It is equivalent to 1.66 × 10^–27 kg. Abbreviation: amu Also called: unified atomic mass unit or dalton

atom′ic mass′ u′nit

a unit of mass, equal to 1/12 the mass of the carbon-12 atom and used to express the mass of atomic and subatomic particles.

Also called dalton.

[1950–55]

atomic mass unit

A unit of mass equal to ¹/₁₂ the mass of an atom of the most common isotope of carbon (carbon 12), which is assigned a mass of 12. A hydrogen atom has a mass of 1 atomic mass unit since its mass is ¹/₁₂ the mass of carbon 12.

atomic mass unit

(amu)

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Noun

atomic mass unit - unit of mass for expressing masses of atoms or molecules

mass unit - a unit of measurement for mass

Translations

unidade de massa atômica

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