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According to the International Union of Pure and Applied Chemistry (IUPAC), 1 atomic mass unit is defined as 1/12 the mass of carbon-12.

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Only protons and neutrons significantly contribute to atomic mass. Each proton and each neutron adds a mass of 1 atomic mass unit (AMU).

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One an amu is 121 of the mass of one carbon-12 atom. It is equal to Na1. =6.022×10231=1.66×10−24g. verified_toppr. Answer verified by Toppr. Upvote (0).

www.britannica.com/science/atomic-mass

It is expressed as a multiple of one-twelfth the mass of the carbon-12 atom, ... In this scale, 1 atomic mass unit (amu) corresponds to 1.66 x 10^−24 gram.

physics.stackexchange.com/questions/105474/the-value-of-one-atomic-mass-unit

Both your answers are same. 1.66×10−27=(6.02×1026)−1. Hope that helps...

es.ucsc.edu/~jnoble/EART6/chemistry1.pdf

1 U nucleus. 6.022 1023 U nuclei mole of U. = 1.08 1013. J mole of U. The mass of a single atom of an element [amu] is numerically equal to the mass [g] of ...

www.dictionary.com/browse/atomic-mass-unit

Atomic mass unit definition, a unit of mass, equal to 1/12 (0.0833) the mass of the carbon-12 atom and used to express the mass of atomic and subatomic ...

www.montgomerycollege.edu/_documents/academics/support/learning-centers/ackerman-learning-center-rockville/atomic-weights.pdf

One atomic mass unit (amu): the mass exactly equal to one-twelfth the mass of one carbon-12 atom that has six protons and six neutrons. 1 atom of carbon-12 = 12 ...

www.westfield.ma.edu/PersonalPages/cmasi/gen_chem1/Lecture_notes/p%2024-28%20AMU,%20atomic%20%26%20molar.pdf

12 AMU because elements exist as a variety of isotopes. ... 1 Atom. Average Mass of. 100 Atoms. C. 12.01 amu. 1,201 amu. H. 1.0079 amu. 100.79 amu.

www.westfield.ma.edu/PersonalPages/cmasi/gen_chem1/Atomic%20and%20molar%20mass/atomic_and_molar_mass.htm

On the periodic table the mass of carbon is reported as 12.01 amu. This is the average ... What is the relative mass of 1 C atom as compared to 1 H atom?

whatis.techtarget.com/definition/atomic-mass-unit-AMU-or-amu

In imprecise terms, one AMU is the average of the proton rest mass and the neutron rest mass. This is approximately 1.67377 x 10 -27 kilogram (kg), or 1.67377 x ...