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Part 1010-4.3
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Part 10: Atomic and Nuclear·125 entries
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Section 10-43 entries
10-4.110-4.210-4.3
10-4.3

unified atomic mass constant

URNurn:iso:std:iso:80000:-10:ed-2:en:item:10-4.3
Download RDF.jsonld.ttl
https://metanorma.github.io/isq-smart/quantities/part-10/t10-4.3
urn:iso:std:iso:80000:-10:ed-2:en:item:10-4.3
ISQ Identifiers
ISO
urn:iso:std:iso:80000:-10:ed-2:en:item:10-4.3
IEC
urn:iec:std:iec:80000-10:2019:::item:10-4.3
Designations
ENunified atomic mass constant
FRconstante unifiée de masse atomique
Symbol
m u
Notation systems
Rendered
m u
AsciiMath
m_"u"
LaTeX
m_{\text{u}}

Definition

EN

1 / 12 of the mass (ISO 80000-4: Mechanics) of an atom of the nuclide 12 C in the ground state at rest

FR

1 / 12 de la masse (ISO 80000-4: Mechanics) d'un atome du nucléide 12 C au repos dans l'état fondamental

Units

k g
kilogram
View related quantities →
u
unified atomic mass unit
View related quantities →
D a
dalton
View related quantities →

Notes

EN

1 unitsml(u) is equal to 1 / 12 times the mass of a free carbon 12 atom, at rest and in its ground state.

1 unitsml(Da) = 1 unitsml(u)
FR

1 unitsml(u) est égal à 1 / 12 de la masse d'un atome libre de carbone 12, au repos et dans son état fondamental.

1 unitsml(Da) = 1 unitsml(u)

Referenced by

mass excessrelative mass excessrelative mass defect
Concept HierarchyPendrill (2024)
Mmass-type quantitiesLevel 0 · Kind

Broader concepts

◇ mass-type quantities

Characterizes

● atom

Ontology
isq:Quantitysmart:TermEntry

Class Hierarchy

smart:Entitysmart:TermEntryisq:Quantity

A physical quantity as defined in ISO/IEC 80000, with associated symbols, definitions, and units of measurement.

Instance IRI

isq:t10-4.3

Properties

isq:QuantityShape
PropertyValue
rdf:type
isq:Quantitysmart:TermEntry
dcterms:identifier
10-4.3
skosxl:prefLabel
"unified atomic mass constant"@en
skosxl:altLabel
"m_"u""@en
skos:definition
stem:[1//12] of the mass (<<iso80000-4>>) of an atom of the nuclide stem:[""^(12)"C"] in the ground state at rest
skos:note
stem:[1 "unitsml(u)"] is equal to stem:[1//12] times the mass of a free carbon 12 atom, at rest and in its ground state.…
isq:hasUnit
kg (kilogram)u (unified atomic mass unit)Da (dalton)
isq:hasDimension
isq:Dimension
smart:hasBindingnessType
bindingness-type:normative
dcterms:isPartOf
isq:part-10

Related Entities

isq:QuantityShape isq:part-10 isq:Unit isq:Dimension isq:hasDimension smart:TermEntry