Magnèsi (Mg)

chemical element, symbol Mg and atomic number 12

Atomic Number	12
Atomic Weight	24.305
mass number	24

Group	2
Period	3
Block	s

proton	12 p⁺
neutron	12 n⁰
electron	12 e^-

Proprietat Fisica

Rai Atomic	150 pm 240 pm
molar volume	14 cm³/mol
covalent radius	139 pm 132 pm 127 pm 142 pm 141 pm
Metallic Radius	136 pm 160 pm
ionic radius	57 pm 66 pm 72 pm 89 pm
Crystal Radius	71 pm 80 pm 86 pm 103 pm
Rai de van der Waals	220 pm 173 pm 173 pm 243 pm 302.1 pm
densitat	1.74 g/cm³ 1584 kg/m³

Chemical Property

energia

proton affinity	819.6 kJ/mol
electron affinity
ionization energy	7.646235 eV/particle 15.035267 eV/particle 80.1436 eV/particle 109.2654 eV/particle 141.335 eV/particle 186.76 eV/particle 225.015 eV/particle 265.924 eV/particle 327.985 eV/particle 367.5 eV/particle 1761.80481 eV/particle 1962.664 eV/particle

enthalpy of vaporization	131.8 kJ/mol
enthalpy of fusion	9.2 kJ/mol
standard enthalpy of formation	147.1 kJ/mol
electron

electron shell	2, 8, 2

valence electron	2 ⓘ

electron configuration	[Ne] 3s²ⓘ 1s² 2s² 2p⁶ 3s²

oxidation number	0, 1, 2
Electronegativitat	7.646 eV/particle 0.121644 1.31
Electrophilicity Index
fundamental state of matter

estat de la matèria	Solid
gaseous state of matter
Boiling Point	1363.15 K
Melting Point	923.15 K
critical pressure
critical temperature
Ponch triple
appearance
Color	Silver #228b22 #8aff00 #8aff00
appearance	shiny grey solid
Indici de refraccion
thermodynamic material property
Thermal Conductivity	156 W/(m K)
thermal expansion	0.0000248 1/K
molar heat capacity	24.869 J/(mol K)
Specific Heat Capacity	1.023 J/(g⋅K)
heat capacity ratio
electrical properties
type	Conductor
electrical conductivity	23 MS/m
electrical resistivity	0.00000004399999999999 Ω*m
superconductivity
magnetism
type	paramagnetic
magnetic susceptibility (Mass)	0.0000000069 m³/Kg
magnetic susceptibility (Molar)	0.000000000168 m³/mol
magnetic susceptibility (Volume)	0.000012
magnetic ordering
Curie temperature
Néel temperature
estructura
Crystal Structure	Simple Hexagonal (HEX)
lattice constant	3.21 Å
Lattice Angles	π/2, π/2, 2 π/3
mechanical property
Duretat	260 MPa 2.5 MPa
bulk modulus	45 GPa
shear modulus	17 GPa
Young's modulus	45 GPa
Poisson's ratio	0.29
speed of sound	4602 m/s
classification
Category	Alkaline earth metals, Alkaline earth metals
CAS Group	IIA
IUPAC Group	IIA
Glawe Number	73
Mendeleev Number	76
Pettifor Number	73
Geochemical Class	major
Goldschmidt classification	litophile

other

Gas Basicity	797.3 kJ/mol
polarizability	71.2 ± 0.4 a₀
C6 Dispersion Coefficient	626 a₀ 629 a₀
allotrope
Neutron cross section	0.063
Neutron Mass Absorption	0.0001
quantum number	1S0
space group	194 (P63/mmc)

Isotopes of Magnesium

Stable Isotopes	3
Unstable Isotopes	20
Natural Isotopes	3

¹⁹Mg

mass number	19
neutron number	7
Relative Atomic Mass	19.03417992 ± 0.000064413 Da
g-factor
natural abundance
Radioactivitat	☢️ radioactive element
Semivida	5 ± 3 ps
Espin	1/2
nuclear quadrupole moment	0
data de descobèrta	2007
parity	-

decay mode	intensity
2p (2-proton emission)	100%

²⁰Mg

mass number	20
neutron number	8
Relative Atomic Mass	20.018763075 ± 0.000002 Da
g-factor	0
natural abundance
Radioactivitat	☢️ radioactive element
Semivida	90.4 ± 0.5 ms
Espin	0
nuclear quadrupole moment	0
data de descobèrta	1974
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)	30.3%

²¹Mg

mass number	21
neutron number	9
Relative Atomic Mass	21.011705764 ± 0.00000081 Da
g-factor	-0.3932 ± 0.0028
natural abundance
Radioactivitat	☢️ radioactive element
Semivida	120 ± 0.4 ms
Espin	5/2
nuclear quadrupole moment
data de descobèrta	1963
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)	20.1%
β⁺α (β⁺-delayed α emission)	0.116%
B+pA	0.016%

²²Mg

mass number	22
neutron number	10
Relative Atomic Mass	21.999570597 ± 0.00000017 Da
g-factor	0
natural abundance
Radioactivitat	☢️ radioactive element
Semivida	3.8745 ± 0.0007 s
Espin	0
nuclear quadrupole moment	0
data de descobèrta	1961
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

²³Mg

mass number	23
neutron number	11
Relative Atomic Mass	22.994123768 ± 0.000000034 Da
g-factor	-0.35753333333333 ± 0.0002
natural abundance
Radioactivitat	☢️ radioactive element
Semivida	11.3039 ± 0.0032 s
Espin	3/2
nuclear quadrupole moment	0.114 ± 0.003
data de descobèrta	1939
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

²⁴Mg

mass number	24
neutron number	12
Relative Atomic Mass	23.985041689 ± 0.000000013 Da
g-factor	0
natural abundance	78.965 ± 0.049
Radioactivitat	stable isotope
Semivida	Not Radioactive ☢️
Espin	0
nuclear quadrupole moment	0
data de descobèrta	1920
parity	+

²⁵Mg

mass number	25
neutron number	13
Relative Atomic Mass	24.985836966 ± 0.00000005 Da
g-factor	-0.342132 ± 0.000012
natural abundance	10.011 ± 0.013
Radioactivitat	stable isotope
Semivida	Not Radioactive ☢️
Espin	5/2
nuclear quadrupole moment	0.199 ± 0.002
data de descobèrta	1920
parity	+

²⁶Mg

mass number	26
neutron number	14
Relative Atomic Mass	25.982592972 ± 0.000000031 Da
g-factor	0
natural abundance	11.025 ± 0.038
Radioactivitat	stable isotope
Semivida	Not Radioactive ☢️
Espin	0
nuclear quadrupole moment	0
data de descobèrta	1920
parity	+

²⁷Mg

mass number	27
neutron number	15
Relative Atomic Mass	26.984340647 ± 0.00000005 Da
g-factor	-0.8212 ± 0.003
natural abundance
Radioactivitat	☢️ radioactive element
Semivida	9.435 ± 0.027 m
Espin	1/2
nuclear quadrupole moment	0
data de descobèrta	1934
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

²⁸Mg

mass number	28
neutron number	16
Relative Atomic Mass	27.983875426 ± 0.00000028 Da
g-factor	0
natural abundance
Radioactivitat	☢️ radioactive element
Semivida	20.915 ± 0.009 h
Espin	0
nuclear quadrupole moment	0
data de descobèrta	1953
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

²⁹Mg

mass number	29
neutron number	17
Relative Atomic Mass	28.988607163 ± 0.000000369 Da
g-factor
natural abundance
Radioactivitat	☢️ radioactive element
Semivida	1.3 ± 0.12 s
Espin	3/2
nuclear quadrupole moment	-0.16 ± 0.04
data de descobèrta	1971
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

³⁰Mg

mass number	30
neutron number	18
Relative Atomic Mass	29.990465454 ± 0.00000139 Da
g-factor	0
natural abundance
Radioactivitat	☢️ radioactive element
Semivida	317 ± 4 ms
Espin	0
nuclear quadrupole moment	0
data de descobèrta	1971
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	0.06%

³¹Mg

mass number	31
neutron number	19
Relative Atomic Mass	30.996648232 ± 0.0000033 Da
g-factor
natural abundance
Radioactivitat	☢️ radioactive element
Semivida	270 ± 2 ms
Espin	1/2
nuclear quadrupole moment	0
data de descobèrta	1977
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	6.2%

³²Mg

mass number	32
neutron number	20
Relative Atomic Mass	31.999110138 ± 0.0000035 Da
g-factor	0
natural abundance
Radioactivitat	☢️ radioactive element
Semivida	80.4 ± 0.4 ms
Espin	0
nuclear quadrupole moment	0
data de descobèrta	1977
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	5.5%

³³Mg

mass number	33
neutron number	21
Relative Atomic Mass	33.005327862 ± 0.000002859 Da
g-factor
natural abundance
Radioactivitat	☢️ radioactive element
Semivida	92 ± 1.2 ms
Espin	3/2
nuclear quadrupole moment	0.13 ± 0.09
data de descobèrta	1979
parity	-

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	14%
2n (2-neutron emission)

³⁴Mg

mass number	34
neutron number	22
Relative Atomic Mass	34.008935455 ± 0.0000074 Da
g-factor	0
natural abundance
Radioactivitat	☢️ radioactive element
Semivida	44.9 ± 0.4 ms
Espin	0
nuclear quadrupole moment	0
data de descobèrta	1979
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	21%
2n (2-neutron emission)	0.1%

³⁵Mg

mass number	35
neutron number	23
Relative Atomic Mass	35.01679 ± 0.0002895 Da
g-factor
natural abundance
Radioactivitat	☢️ radioactive element
Semivida	11.3 ± 0.6 ms
Espin	3/2
nuclear quadrupole moment
data de descobèrta	1989
parity	-

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	52%
2n (2-neutron emission)

³⁶Mg

mass number	36
neutron number	24
Relative Atomic Mass	36.021879 ± 0.000741 Da
g-factor	0
natural abundance
Radioactivitat	☢️ radioactive element
Semivida	3.9 ± 1.3 ms
Espin	0
nuclear quadrupole moment	0
data de descobèrta	1989
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	48%
2n (2-neutron emission)

³⁷Mg

mass number	37
neutron number	25
Relative Atomic Mass	37.030286265 ± 0.00075035 Da
g-factor
natural abundance
Radioactivitat	☢️ radioactive element
Semivida	8 ± 4 ms
Espin	3/2
nuclear quadrupole moment
data de descobèrta	1996
parity	-

decay mode	intensity
β⁻ (β⁻ decay)
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

³⁸Mg

mass number	38
neutron number	26
Relative Atomic Mass	38.03658 ± 0.00054 Da
g-factor	0
natural abundance
Radioactivitat	☢️ radioactive element
Semivida
Espin	0
nuclear quadrupole moment	0
data de descobèrta	1997
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

³⁹Mg

mass number	39
neutron number	27
Relative Atomic Mass	39.045921 ± 0.000551 Da
g-factor
natural abundance
Radioactivitat	☢️ radioactive element
Semivida
Espin	7/2
nuclear quadrupole moment
data de descobèrta
parity	-

decay mode	intensity
n (neutron emission)
β⁻ (β⁻ decay)

⁴⁰Mg

mass number	40
neutron number	28
Relative Atomic Mass	40.053194 ± 0.000537 Da
g-factor	0
natural abundance
Radioactivitat	☢️ radioactive element
Semivida
Espin	0
nuclear quadrupole moment	0
data de descobèrta	2007
parity	+

decay mode	intensity
β⁻ (β⁻ decay)
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

⁴¹Mg

mass number	41
neutron number	29
Relative Atomic Mass	41.062373 ± 0.000537 Da
g-factor
natural abundance
Radioactivitat	☢️ radioactive element
Semivida
Espin	3/2
nuclear quadrupole moment
data de descobèrta
parity	-

decay mode	intensity
β⁻ (β⁻ decay)
β⁻ n (β⁻-delayed neutron emission)

istòria

descobridor o inventaire	Sir Humphrey Davy
luòc de descobèrta	England
data de descobèrta	1808
Etimologia	From Magnesia ancient city in district of Thessaly, Greece.
pronunciation	mag-NEE-zih-em (English)

source

Abundance
Abundance in Earth's crust	23300 mg/kg
natural abundance (Ocean)	1290 mg/L
natural abundance (còs uman)	0.027 %
natural abundance (meteoroid)	12 %
natural abundance (Solelh)	0.07 %
Abundance in Universe	0.06 %

Nuclear Screening Constants

1	s	0.3911
2	p	4.1742
2	s	4.608
3	s	8.6925

Magnèsi on ChemicalAid

Australian Educational Vocabulary ID	scot/3540
Brockhaus Enzyklopädie online ID	magnesium
CosIng number	87337
DSSTOX compound identifier	DTXCID70876310
Den Store Danske ID	magnesium
Encyclopedia of China ID (Second Edition)	220792
Encyclopædia Universalis ID	magnesium
English Vikidia ID	Magnesium
EuroVoc ID	1736
French Vikidia ID	Magnésium
Golden ID	Magnesium-6GEP
Great Russian Encyclopedia Online ID	2152449
HCIS ID	2785
HSDB ID	654
ICSC ID	0701
ICSC ID	0289
InChI	InChI=1S/Mg
InChIKey	FYYHWMGAXLPEAU-UHFFFAOYSA-N
Italian Vikidia ID	Magnesio
KBpedia ID	Magnesium
Krugosvet article	nauka_i_tehnika/himiya/MAGNI.html
Latvian National Encyclopedia Online ID	94910
Mindat mineral ID	52650
NALT ID	6422
Namuwiki ID	마그네슘
National Library of Israel J9U ID	987007543565105171
OpenAlex ID	C543218039
Open Food Facts ingredient ID	magnesium
PACTOLS thesaurus ID	pcrtQe4n9vGjl0
PatientsLikeMe treatment ID	magnesium
RxNorm CUI	6574
STW Thesaurus for Economics ID	14300-4
Spanish Vikidia ID	Magnesio
Store norske leksikon ID	magnesium
U.S. National Archives Identifier	10646571
UK Parliament thesaurus ID	11483
UMLS CUI	C0024467
USGS Thesaurus ID	1498
WikiSkripta ID	1272
WordNet 3.1 Synset ID	14668427-n
YSO ID	3518
identificacion NK ČR	ph120851
identificant Art & Arquitectura Thesaurus	300011024
identificant BNE	XX530348
identificant BNF	119771902
identificant ChEBI	25107
identificant ChemSpider	4575328
identificant DSSTOX de substància	DTXSID0049658
identificant Drangbank	14513
identificant Enciclopedia Treccani	magnesio
identificant Encyclopædia Britannica en linha	science/magnesium
identificant Freebase	/m/025s0s0
identificant GND	4128915-8
identificant Gran Enciclopèdia Catalana	0233796
identificant MeSH	D008274
identificant NDF-RT	N0000146038
identificant NDL	00567385
identificant Nationalencyklopedin Online	magnesium
identificant PSH	5751
identificant PubChem (CID)	5462224
identificant Quora d'un subjècte	Magnesium
identificant UNII	I38ZP9992A
identificant bibliotèca del Congrès	sh85079651
identificant d'InfoCard ECHA	100.028.276
identificant del thesaurus de la BNCF	34769
numèro CAS	7439-95-4
numèro ZVG	500042
numèro ZVG	8090
numèro ZVG	7120
sens definit OmegaWiki	158358

Magnèsi (Mg)

Proprietat Fisica

Chemical Property

other

Isotopes of Magnesium

19Mg

20Mg

21Mg

22Mg

23Mg

24Mg

25Mg

26Mg

27Mg

28Mg

29Mg

30Mg

31Mg

32Mg

33Mg

34Mg

35Mg

36Mg

37Mg

38Mg

39Mg

40Mg

41Mg

istòria

source

Nuclear Screening Constants

¹⁹Mg

²⁰Mg

²¹Mg

²²Mg

²³Mg

²⁴Mg

²⁵Mg

²⁶Mg

²⁷Mg

²⁸Mg

²⁹Mg

³⁰Mg

³¹Mg

³²Mg

³³Mg

³⁴Mg

³⁵Mg

³⁶Mg

³⁷Mg

³⁸Mg

³⁹Mg

⁴⁰Mg

⁴¹Mg