magnesium
Chemical element, symbol Mg and atomic number 12
Also known as element 12 · 12Mg
- Symbol
- Mg
2
Sources- 1.Stated in Atomic weights of the elements 2009 (IUPAC Technical Report)
- 2.worldofmolecules.com/elements/magnesium.htmRetrieved 2018-07-28
- Mg
- Atomic number
- 12
- Mass
- 24.305 Da
1
Sources- 1.Stated in Pure and Applied Chemistry“Standard atomic weights of the elements 2021 (IUPAC Technical Report)”Retrieved 2022-05-06
- 24.305 Da
- Melting point
- 649°C
1
Sources- 1.Stated in International Chemical Safety Card“MAGNESIUM (POWDER)”Retrieved 2019-06-13
- 649°C
- Boiling point
- 1,100°C
1
Sources- 1.Stated in International Chemical Safety Card“MAGNESIUM (POWDER)”Retrieved 2019-06-13
- 1,100°C
- Density
- 1,801.8 kg/m³
- Discovered by
- Discovered
- 1755
Overview
All data
186 statements · 30% with external sources · numbers in brackets are citations
- Oxidation state
- 2
- 1
- 0
- Named after
- magnesium oxide subject named as: magnesia alba
- Canonical SMILES
- [Mg]
1
- [Mg]
- Formula
- Mg
2
Sources- 1.Stated in PubChem“MAGNESIUM”Retrieved 2016-11-18
- 2.worldofmolecules.com/elements/magnesium.htmRetrieved 2018-07-28
- Mg
- Part of
- period 3 follows: sodium · followed by: aluminium
1
Sources- 1.worldofmolecules.com/elements/magnesium.htmRetrieved 2018-07-28
- alkaline earth metal follows: beryllium · followed by: calcium
1
Sources- 1.worldofmolecules.com/elements/magnesium.htmRetrieved 2018-07-28
- period 3 follows: sodium · followed by: aluminium
- Electronegativity
- 1
1
Sources- 1.worldofmolecules.com/elements/magnesium.htmRetrieved 2018-07-28
- 1
- Standard molar entropy
- 32.7 joule per mole kelvin state of matter: solid
- Electrical conductivity
- 21.5M ampere per volt metre temperature: 20°C
1
Sources- 1.thebalance.com/electrical-conductivity-in-metals-2340117Retrieved 2019-01-30
- 21.5M ampere per volt metre temperature: 20°C
- Subclass of
- period 3 follows: sodium · followed by: scandium
1
Sources- 1.worldofmolecules.com/elements/magnesium.htmRetrieved 2018-07-28
- alkaline earth metal follows: beryllium · followed by: calcium
1
Sources- 1.worldofmolecules.com/elements/magnesium.htmRetrieved 2018-07-28
- light metal
- s-block
- period 3 follows: sodium · followed by: scandium
- Electron configuration
- 1s² 2s² 2p⁶ 3s²
- [Ne] 3s²
- Ionic radius
- 0.57 ångström charge number: 2 · coordination number: 4
- 0.72 ångström charge number: 2 · coordination number: 6
- 0.89 ångström charge number: 2 · coordination number: 8
- Found in taxon
- Bulk modulus
- 36.4B Pa
- Shear modulus
- 24.4B Pa
- Poisson's ratio
- 0.226
- Thermal conductivity
- 160 watt per metre kelvin
- Specific heat capacity
- 1,023 joule per kilogram kelvin
- Speed of sound
- 4,602 m/s
- Electrical resistivity
- 4.39e-8 ohm metre
- Ionization energy
- 7.6462 eV
1
Sources- 1.“NIST Atomic Spectra Database, Ionization Energies”physics.nist.gov/asdRetrieved 2026-09-18
- 15.0353 eV
1
Sources- 1.“NIST Atomic Spectra Database, Ionization Energies”physics.nist.gov/asdRetrieved 2026-09-18
- 80.1436 eV
1
Sources- 1.“NIST Atomic Spectra Database, Ionization Energies”physics.nist.gov/asdRetrieved 2026-09-18
- 7.6462 eV
- IPA transcription
- mæɡˈniːziəm language: English
- Atomic radius
- 150 picometre
- Covalent radius
- 141 picometre
- Van der Waals radius
- 173 picometre
On other databases
98 identifiers linking magnesium across the web's reference databases
- A Dictionary of Genetics entry ID3899
- Arabic Ontology lexical concept ID151078491
- Art & Architecture Thesaurus ID300011024
- Australian Educational Vocabulary IDscot/3540
- BabelNet ID00006843n
- Bibliothèque nationale de France ID119771902
- BNCF Thesaurus ID34769
- Brockhaus Enzyklopädie online IDmagnesium
- CAMEO Chemicals ID6949
- CAS Registry Number7439-95-4
- ChEBI ID25107
- ChemSpider ID4575328
- COD ID1575875
- CosIng number87337
- De Agostini IDmagnèsio
- Dewey Decimal Classification546.392
- DSSTOX compound identifierDTXCID70876310
- DSSTox substance IDDTXSID0049658
- EC number231-104-6
- ECHA Substance Infocard ID100.028.276
- Encyclopædia Britannica Online IDscience/magnesium
- Encyclopædia Universalis IDmagnesium
- Encyclopedia of China (Second Edition) ID220792
- Encyclopedia of China (Third Edition) ID (2026)340qaf
- Encyclopedia of China (Third Edition) old ID (2021)298926
- Encyclopedia of Korean Culture IDE0017297
- EuroVoc ID1736
- Freebase ID/m/025s0s0
- GND ID4128915-8
- Golden ID (archived)Magnesium-6GEP
- Gran Enciclopèdia Catalana IDmagnesi
- Gran Enciclopèdia Catalana ID (former scheme)0233796
- Great Norwegian Encyclopedia IDmagnesium
- Great Russian Encyclopedia portal IDmagnii-df354d
- HCIS ID2785
- Hrvatska enciklopedija IDmagnezij
- HSDB ID654
- ICSC ID0701
- InChIInChI=1S/Mg
- InChIKeyFYYHWMGAXLPEAU-UHFFFAOYSA-N
- Interlingual Index IDi113962
- J9U entity ID987007543565105171
- JSTOR topic ID (archived)magnesium-compounds
- KBpedia IDMagnesium
- Krugosvet article (archived)nauka_i_tehnika/himiya/MAGNI.html
- Larousse IDdivers/magnésium/67387
- Latvian National Encyclopedia Online ID94910
- Lex IDmagnesium
- Library of Congress Authorities IDsh85079651
- MeSH descriptor IDD008274
- MeSH tree codeD01.268.552.437
- Microsoft Academic ID (discontinued)543218039
- Mindat mineral ID52650
- Museum-digital tag ID117113
- NALT ID6422
- Namuwiki ID마그네슘
- National Library of Spain SpMaBN IDXX530348
- NDF-RT IDN0000146038
- NDL Authority ID00567385
- NE.se IDmagnesium
- NicoNicoPedia word article IDマグネシウム
- NL CR AUT IDph120851
- OmegaWiki Defined Meaning158358
- Open Food Facts ingredient IDmagnesium
- Open Library subject IDmagnesium
- OpenAlex IDC543218039
- PACTOLS thesaurus IDpcrtQe4n9vGjl0
- PatientsLikeMe treatment IDmagnesium
- Pixiv Encyclopedia IDマグネシウム
- PM20 ware ID143528
- PSH ID5751
- PubChem CID5462224
- Quora topic IDMagnesium
- RxNorm CUI6574
- ScienceDirect topic IDchemistry/magnesium
- Springer Nature Subjects Taxonomy IDmagnesium
- STW Thesaurus for Economics ID14300-4
- SureChEMBL ID29350814
- SVKKL authority ID0231212-horcik
- Treccani IDmagnesio
- Treccani Vocabulary IDmagnesio
- Treccani's Dizionario delle Scienze Fisiche IDmagnesio
- Treccani's Dizionario di Economia e Finanza IDmagnesio
- Treccani's Dizionario di Medicina IDmagnesio
- Treccani's Enciclopedia Italiana IDmagnesio
- U.S. National Archives Identifier10646571
- UK Parliament thesaurus ID11483
- UMLS CUIC0024467
- UniChem compound ID244001
- UNIII38ZP9992A