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• Relative_atomic_mass abstract "Relative atomic mass (symbol: Ar) is a dimensionless physical quantity, the ratio of the average mass of atoms of an element (from a single given sample or source) to 1⁄12 of the mass of an atom of carbon-12 (known as the unified atomic mass unit). The relative atomic mass is a statistical term, referring to an abundance-weighted figure involving measurement of many atoms. As in all related terms, the word \"relative\" refers to making the figure relative to carbon-12, so that the final figure is dimensionless.The term relative atomic mass is exactly equivalent to atomic weight, which is the older term. In technical usage, these values are sample-specific (i.e., element source-specific) when a natural element source is composed of more than one isotope. Thus, two samples of a chemical element which is naturally found as being composed of more than one isotope, collected from two substantially different sources, are expected to give slightly different relative atomic masses (atomic weights), because isotopic concentrations typically vary slightly due to the history (origin) of the source. These values differences are real and repeatable, and can be used to identify specific samples. For example, a sample of elemental carbon from volcanic methane will have a different relative atomic mass (atomic weight) than one collected from plant or animal tissues (for more, see isotope geochemistry). In short, the atomic weight (relative atomic mass) of carbon varies slightly from place to place and from source to source, a fact that can be useful. However, a typical (standard) figure also can be useful, as follows.Both the terms relative atomic mass and atomic weight are sometimes loosely used to refer to a technically different standardized expectation value, called the standard atomic weight. This value is the mean value of atomic weights of a number of \"normal samples\" of the element in question. For this definition, \"[a] normal sample is any reasonably possible source of the element or its compounds in commerce for industry and science and has not been subject to significant modification of isotopic composition within a geologically brief period.\" These standard atomic weights are published at regular intervals by the Commission on Isotopic Abundances and Atomic Weights of the International Union of Pure and Applied Chemistry (IUPAC) The \"standard\" values are intended as mean values that compensate for small variances in the isotopic composition of the chemical elements across a range of ordinary samples on Earth, and thus to be applicable to normal laboratory materials. However, they may not accurately reflect values from samples from unusual locations or extraterrestrial objects, which often have more widely variant isotopic compositions.The standard atomic weights are reprinted in a wide variety of textbooks, commercial catalogues, Periodic Table wall charts etc., and in the table below. They are what chemists loosely call \"atomic weights.\"The continued use of the term \"atomic weight\" (of any element), as opposed to \"relative atomic mass\" has attracted considerable controversy, since at least the 1960s, mainly due to the technical difference between weight and mass in physics. (see below). Both terms are officially sanctioned by IUPAC. The term \"relative atomic mass\" now seems to be gaining as the preferred term over \"atomic weight,\" although in the case of \"standard atomic weight,\" this shorter term (as opposed to \"standard relative atomic mass\") continues to be preferred.".
• Relative_atomic_mass thumbnail Atomic_number_Atomic_weight.jpg?width=300.
• Relative_atomic_mass wikiPageExternalLink stand_alone.pl?ele=&ascii=html&isotype=some.
• Relative_atomic_mass wikiPageExternalLink 1047.
• Relative_atomic_mass wikiPageExternalLink www.ciaaw.org.
• Relative_atomic_mass wikiPageID "213968".
• Relative_atomic_mass wikiPageLength "20580".
• Relative_atomic_mass wikiPageOutDegree "62".
• Relative_atomic_mass wikiPageRevisionID "698395754".
• Relative_atomic_mass wikiPageWikiLink Atmosphere_of_Earth.
• Relative_atomic_mass wikiPageWikiLink Atom.
• Relative_atomic_mass wikiPageWikiLink Atomic_mass.
• Relative_atomic_mass wikiPageWikiLink Atomic_mass_unit.
• Relative_atomic_mass wikiPageWikiLink Avogadro_constant.
• Relative_atomic_mass wikiPageWikiLink Boron.
• Relative_atomic_mass wikiPageWikiLink California.
• Relative_atomic_mass wikiPageWikiLink Carbon-12.
• Relative_atomic_mass wikiPageWikiLink Category:Amount_of_substance.
• Relative_atomic_mass wikiPageWikiLink Category:Chemical_properties.
• Relative_atomic_mass wikiPageWikiLink Category:Periodic_table.
• Relative_atomic_mass wikiPageWikiLink Category:Stoichiometry.
• Relative_atomic_mass wikiPageWikiLink Chemical_element.
• Relative_atomic_mass wikiPageWikiLink Commission_on_Isotopic_Abundances_and_Atomic_Weights.
• Relative_atomic_mass wikiPageWikiLink Compendium_of_Chemical_Terminology.
• Relative_atomic_mass wikiPageWikiLink Dimensionless_quantity.
• Relative_atomic_mass wikiPageWikiLink Electromotive_force.
• Relative_atomic_mass wikiPageWikiLink Empirical_distribution_function.
• Relative_atomic_mass wikiPageWikiLink Fluorine.
• Relative_atomic_mass wikiPageWikiLink Force.
• Relative_atomic_mass wikiPageWikiLink Gravimetric_analysis.
• Relative_atomic_mass wikiPageWikiLink Gravitational_field.
• Relative_atomic_mass wikiPageWikiLink International_Union_of_Pure_and_Applied_Chemistry.
• Relative_atomic_mass wikiPageWikiLink Isotope.
• Relative_atomic_mass wikiPageWikiLink Isotope_analysis.
• Relative_atomic_mass wikiPageWikiLink Isotope_geochemistry.
• Relative_atomic_mass wikiPageWikiLink List_of_elements.
• Relative_atomic_mass wikiPageWikiLink Lithium.
• Relative_atomic_mass wikiPageWikiLink Mass.
• Relative_atomic_mass wikiPageWikiLink Measurement_uncertainty.
• Relative_atomic_mass wikiPageWikiLink Metrology.
• Relative_atomic_mass wikiPageWikiLink Molar_concentration.
• Relative_atomic_mass wikiPageWikiLink Mononuclidic_element.
• Relative_atomic_mass wikiPageWikiLink Natural_abundance.
• Relative_atomic_mass wikiPageWikiLink Newton_(unit).
• Relative_atomic_mass wikiPageWikiLink Nuclide.
• Relative_atomic_mass wikiPageWikiLink Optical_resolution.
• Relative_atomic_mass wikiPageWikiLink Physical_quantity.
• Relative_atomic_mass wikiPageWikiLink Poundal.
• Relative_atomic_mass wikiPageWikiLink Power_(physics).
• Relative_atomic_mass wikiPageWikiLink Relative_atomic_mass.
• Relative_atomic_mass wikiPageWikiLink Silicon.
• Relative_atomic_mass wikiPageWikiLink Structure_of_the_Earth.
• Relative_atomic_mass wikiPageWikiLink Synthetic_element.
• Relative_atomic_mass wikiPageWikiLink Turkey.
• Relative_atomic_mass wikiPageWikiLink Weight.
• Relative_atomic_mass wikiPageWikiLink Weighted_arithmetic_mean.
• Relative_atomic_mass wikiPageWikiLink File:Atomic_number_Atomic_weight.jpg.
• Relative_atomic_mass wikiPageWikiLink File:IUPAC_Periodic_Table_of_the_Elements_2011.jpg.
• Relative_atomic_mass wikiPageWikiLinkText "Relative atomic mass".
• Relative_atomic_mass wikiPageWikiLinkText "Relative atomic mass#Periodic table by atomic weight".
• Relative_atomic_mass wikiPageWikiLinkText "atomic weight".
• Relative_atomic_mass wikiPageWikiLinkText "atomic weights".
• Relative_atomic_mass wikiPageWikiLinkText "relative ''atomic'' mass".
• Relative_atomic_mass wikiPageWikiLinkText "relative atomic mass".
• Relative_atomic_mass wikiPageWikiLinkText "standard relative atomic mass".
• Relative_atomic_mass wikiPageUsesTemplate Template:Authority_control.
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• Relative_atomic_mass wikiPageUsesTemplate Template:E.
• Relative_atomic_mass wikiPageUsesTemplate Template:Frac.
• Relative_atomic_mass wikiPageUsesTemplate Template:Main.
• Relative_atomic_mass wikiPageUsesTemplate Template:Paragraph_break.
• Relative_atomic_mass wikiPageUsesTemplate Template:PeriodicTablesFooter.
• Relative_atomic_mass wikiPageUsesTemplate Template:Periodic_table_(atomic_weight).
• Relative_atomic_mass wikiPageUsesTemplate Template:Redirect-distinguish.
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• Relative_atomic_mass wikiPageUsesTemplate Template:Sub.
• Relative_atomic_mass wikiPageUsesTemplate Template:Sup.
• Relative_atomic_mass subject Category:Amount_of_substance.
• Relative_atomic_mass subject Category:Chemical_properties.
• Relative_atomic_mass subject Category:Periodic_table.
• Relative_atomic_mass subject Category:Stoichiometry.
• Relative_atomic_mass hypernym Quantity.
• Relative_atomic_mass type TelevisionShow.
• Relative_atomic_mass type Element.
• Relative_atomic_mass type Property.
• Relative_atomic_mass type Quantity.
• Relative_atomic_mass type Redirect.
• Relative_atomic_mass type Thing.
• Relative_atomic_mass comment "Relative atomic mass (symbol: Ar) is a dimensionless physical quantity, the ratio of the average mass of atoms of an element (from a single given sample or source) to 1⁄12 of the mass of an atom of carbon-12 (known as the unified atomic mass unit). The relative atomic mass is a statistical term, referring to an abundance-weighted figure involving measurement of many atoms.".
• Relative_atomic_mass label "Relative atomic mass".
• Relative_atomic_mass differentFrom Atomic_mass.
• Relative_atomic_mass sameAs Q41377.
• Relative_atomic_mass sameAs Адносная_атамная_маса.
• Relative_atomic_mass sameAs Massa_atòmica_relativa.
• Relative_atomic_mass sameAs Relativní_atomová_hmotnost.
• Relative_atomic_mass sameAs Peso_atómico.
• Relative_atomic_mass sameAs جرم_اتمی_نسبی.
• Relative_atomic_mass sameAs Mais_adamhach_choibhneasta.
• Relative_atomic_mass sameAs משקל_אטומי.
• Relative_atomic_mass sameAs Relativna_atomska_masa.

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