Magnesium

Magnesium (Mg)

chemical element, symbol Mg and atomic number 12
Atomic Number12
Atomic Weight24.305
Massagetal24
Group2
Period3
Blocks
proton12 p+
neutron12 n0
elektron12 e-
Animated Bohr model of Mg (Magnesium)

Physical Property

Atoomradius
150 pm
molar volume
Covalent Radius
139 pm
Metallic Radius
136 pm
Ioonradius
57 pm
Crystal Radius
71 pm
Van der Waals radius
173 pm
density
1,74 g/cm³
Atomic Radii Of The Elements: Magnesium0153045607590105120135150165180pmAtoomradiusCovalent RadiusMetallic RadiusVan der Waals radius

Chemical Property

energie
proton affinity
819,6 kJ/mol
electron affinity
ionization energy
7,646235 eV/particle
ionization energy of Mg (Magnesium)
Verdampingswarmte
131,8 kJ/mol
smeltingswarmte
9,2 kJ/mol
Vormingsentalpie
147,1 kJ/mol
elektron
Elektronskil2, 8, 2
Bohr model: Mg (Magnesium)
Valenselektrone2
Lewisteorie: Mg (Magnesium)
elektronkonfigurasie[Ne] 3s2
1s2 2s2 2p6 3s2
Enhanced Bohr model of Mg (Magnesium)
Orbital Diagram of Mg (Magnesium)
Oksidasietoestand0, 1, 2
Elektronegatiwiteit
1.31
Electrophilicity Index
fundamental state of matter
phase of matterSolid
gaseous state of matter
Boiling Point
1 363,15 K
Melting Point
923,15 K
critical pressure
critical temperature
triple point
appearance
kleur
Silver
appearanceshiny grey solid
Brekingsindeks
thermodynamic material property
Thermal Conductivity
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
typeConductor
Geleidingsvermoë
23 MS/m
Elektriese resistiwiteit
0,00000004399999999999 m Ω
superconductivity
Magnetisme
typeparamagnetic
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
structure
Crystal StructureSimple Hexagonal (HEX)
lattice constant
3,21 Å
Lattice Anglesπ/2, π/2, 2 π/3
mechanical property
hardness
2,5 MPa
Massamodulus
45 GPa
Skuifmodulus
17 GPa
Young se modulus
45 GPa
Poisson se verhouding
0,29
Spoed van klank
4 602 m/s
classification
CategoryAlkaline earth metals, Alkaline earth metals
CAS GroupIIA
IUPAC GroupIIA
Glawe Number73
Mendeleev Number76
Pettifor Number73
Geochemical Classmajor
Goldschmidt classificationlitophile

other

Gas Basicity
797,3 kJ/mol
polarizability
71,2 ± 0,4 a₀
C6 Dispersion Coefficient
626 a₀
allotrope
Neutron cross section
0,063
Neutron Mass Absorption
0,0001
quantum number1S0
Ruimtegroep194 (P63/mmc)

Isotopes of Magnesium

Stable Isotopes3
Unstable Isotopes20
Natural Isotopes3
Isotopic Composition2478.96%2478.96%2611.02%2611.02%2510.01%2510.01%

19Mg

Massagetal19
neutron number7
relative atomic mass
19,03417992 ± 0,000064413 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
5 ± 3 ps
spin1/2
nuclear quadrupole moment
0
ontdekkingsdatum2007
parity-

decay modeintensity
2p (2-proton emission)100%

20Mg

Massagetal20
neutron number8
relative atomic mass
20,018763075 ± 0,000002 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
90,4 ± 0,5 ms
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1974
parity+

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

21Mg

Massagetal21
neutron number9
relative atomic mass
21,011705764 ± 0,00000081 Da
g-factor
-0,3932 ± 0,0028
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
120 ± 0,4 ms
spin5/2
nuclear quadrupole moment
ontdekkingsdatum1963
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)20.1%
β+α (β+-delayed α emission)0.116%
B+pA0.016%

22Mg

Massagetal22
neutron number10
relative atomic mass
21,999570597 ± 0,00000017 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
3,8745 ± 0,0007 s
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1961
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

23Mg

Massagetal23
neutron number11
relative atomic mass
22,994123768 ± 0,000000034 Da
g-factor
-0,35753333333333 ± 0,0002
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
11,3039 ± 0,0032 s
spin3/2
nuclear quadrupole moment
0,114 ± 0,003
ontdekkingsdatum1939
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

24Mg

Massagetal24
neutron number12
relative atomic mass
23,985041689 ± 0,000000013 Da
g-factor
0
natural abundance
78,965 ± 0,049
radioaktiwiteitStabiele isotoop
HalfleeftydNot Radioactive ☢️
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1920
parity+

25Mg

Massagetal25
neutron number13
relative atomic mass
24,985836966 ± 0,00000005 Da
g-factor
-0,342132 ± 0,000012
natural abundance
10,011 ± 0,013
radioaktiwiteitStabiele isotoop
HalfleeftydNot Radioactive ☢️
spin5/2
nuclear quadrupole moment
0,199 ± 0,002
ontdekkingsdatum1920
parity+

26Mg

Massagetal26
neutron number14
relative atomic mass
25,982592972 ± 0,000000031 Da
g-factor
0
natural abundance
11,025 ± 0,038
radioaktiwiteitStabiele isotoop
HalfleeftydNot Radioactive ☢️
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1920
parity+

27Mg

Massagetal27
neutron number15
relative atomic mass
26,984340647 ± 0,00000005 Da
g-factor
-0,8212 ± 0,003
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
9,435 ± 0,027 m
spin1/2
nuclear quadrupole moment
0
ontdekkingsdatum1934
parity+

decay modeintensity
β (β decay)100%

28Mg

Massagetal28
neutron number16
relative atomic mass
27,983875426 ± 0,00000028 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
20,915 ± 0,009 h
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1953
parity+

decay modeintensity
β (β decay)100%

29Mg

Massagetal29
neutron number17
relative atomic mass
28,988607163 ± 0,000000369 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
1,3 ± 0,12 s
spin3/2
nuclear quadrupole moment
-0,16 ± 0,04
ontdekkingsdatum1971
parity+

decay modeintensity
β (β decay)100%

30Mg

Massagetal30
neutron number18
relative atomic mass
29,990465454 ± 0,00000139 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
317 ± 4 ms
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1971
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)0.06%

31Mg

Massagetal31
neutron number19
relative atomic mass
30,996648232 ± 0,0000033 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
270 ± 2 ms
spin1/2
nuclear quadrupole moment
0
ontdekkingsdatum1977
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)6.2%

32Mg

Massagetal32
neutron number20
relative atomic mass
31,999110138 ± 0,0000035 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
80,4 ± 0,4 ms
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1977
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)5.5%

33Mg

Massagetal33
neutron number21
relative atomic mass
33,005327862 ± 0,000002859 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
92 ± 1,2 ms
spin3/2
nuclear quadrupole moment
0,13 ± 0,09
ontdekkingsdatum1979
parity-

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)14%
2n (2-neutron emission)

34Mg

Massagetal34
neutron number22
relative atomic mass
34,008935455 ± 0,0000074 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
44,9 ± 0,4 ms
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1979
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)21%
2n (2-neutron emission)0.1%

35Mg

Massagetal35
neutron number23
relative atomic mass
35,01679 ± 0,0002895 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
11,3 ± 0,6 ms
spin3/2
nuclear quadrupole moment
ontdekkingsdatum1989
parity-

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)52%
2n (2-neutron emission)

36Mg

Massagetal36
neutron number24
relative atomic mass
36,021879 ± 0,000741 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
3,9 ± 1,3 ms
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1989
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)48%
2n (2-neutron emission)

37Mg

Massagetal37
neutron number25
relative atomic mass
37,030286265 ± 0,00075035 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
8 ± 4 ms
spin3/2
nuclear quadrupole moment
ontdekkingsdatum1996
parity-

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)
2n (2-neutron emission)

38Mg

Massagetal38
neutron number26
relative atomic mass
38,03658 ± 0,00054 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1997
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)
2n (2-neutron emission)

39Mg

Massagetal39
neutron number27
relative atomic mass
39,045921 ± 0,000551 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
spin7/2
nuclear quadrupole moment
ontdekkingsdatum
parity-

decay modeintensity
n (neutron emission)
β (β decay)

40Mg

Massagetal40
neutron number28
relative atomic mass
40,053194 ± 0,000537 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
spin0
nuclear quadrupole moment
0
ontdekkingsdatum2007
parity+

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)
2n (2-neutron emission)

41Mg

Massagetal41
neutron number29
relative atomic mass
41,062373 ± 0,000537 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
spin3/2
nuclear quadrupole moment
ontdekkingsdatum
parity-

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)
Magnesium crystals

geskiedenis

Ontdek deurSir Humphrey Davy
ligging van ontdekkingEngland
ontdekkingsdatum1808
etimologieFrom Magnesia ancient city in district of Thessaly, Greece.
uitspraakmag-NEE-zih-em (Engels)

source

Abundance
Abundance in Earth's crust
23 300 mg/kg
natural abundance (oseaan)
1 290 mg/L
natural abundance (human body)
0,027 %
natural abundance (Meteoroïde)
12 %
natural abundance (Son)
0,07 %
Abundance in Universe
0,06 %

Nuclear Screening Constants

1s0.3911
2p4.1742
2s4.608
3s8.6925