atomic mass unit

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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

(Mathematics & Measurements / 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 dalton

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 and has a value of 1.660 × 10^-24 grams. A hydrogen atom has a mass of 1 atomic mass unit since its mass is ¹/₁₂ the mass of carbon 12. Also called dalton.

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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

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