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pubs.acs.org/doi/10.1021/ed2001957

Nov 1, 2011 ... Definition 1: The Dalton (Da) and the unified atomic mass unit (u) are alternative names (and symbols) for the same unit, equal to 1/12 times the ...

sites.science.oregonstate.edu/chemistry/courses/ch121-3s/ch121/Answers%20to%20interesting%20questions/history_of_the_atomic_mass_unit.htm

Stanislao Cannizzaro (1826–1910), the pioneer in this field, adopted the hydrogen atom as a standard of mass and set its atomic weight at 2. Others accepted the ...

saylordotorg.github.io/text_the-basics-of-general-organic-and-biological-chemistry/s05-05-atomic-masses.html

Masses of other atoms are expressed with respect to the atomic mass unit. For example, the mass of an atom of 1H is 1.008 u, the mass of an atom of 16O is ...

www.chem.ucla.edu/harding/IGOC/A/amu.html

Atomic mass unit (amu; dalton): A unit of mass equal to exactly 1/12 the mass of oneC atom, or 1.660538921 x 10−27 kg. This is the approximate mass of one ...

www.nature.com/articles/128731a0

DISCUSSING the unit of atomic weight before Section A (Physics) at the meeting of the British Association in London on Sept. 28, Dr. F. W. Aston contrasted the ...

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

atomic mass unit (AMU or amu) ... An atomic mass unit (symbolized AMU or amu) is defined as precisely 1/12 the mass of an atom of carbon-12. The carbon-12 (C-  ...

www.osmosis.org/learn/Atomic_units_and_moles

Oct 15, 2020 ... Actually, the atomic mass unit is currently defined as assigning a mass of exactly 12 amu to a carbon-12 atom. But many elements exist in ...

units.fandom.com/wiki/Atomic_mass_unit

The unified atomic mass unit (Also known as amu, symbol: u) or dalton (symbol: Da) is a unit that is used for indicating mass on an atomic or molecular scale.

www.jstage.jst.go.jp/article/massspec/56/6/56_6_269/_article/-char/en

The term “atomic mass unit” (unit symbol: amu) has been used as a unit of mass defined as one-sixteenth the mass of a single atom 16O [m(16O)=16 amu] in ...

www.britannica.com/science/atomic-weight

Atomic weight, ratio of the average mass of a chemical element's atoms to some standard. Since 1961 the standard unit of atomic mass has been one-twelfth the ...