Aluminum

Aluminum (Al)

Aluminum is the 13th element in the periodic table and has a symbol of Al and atomic number of 13. It has an atomic weight of 26.98154 and a mass number of 27. Aluminum has thirteen protons and fourteen neutrons in its nucleus, and thirteen electrons in three shells. It is located in group thirteen, period three and block p of the periodic table. Silvery-white lustrous metallic element of group 3 of the periodic table. Highly reactive but protected by a thin transparent layer of the oxide which quickly forms in air. There are many alloys of aluminum, as well as a good number of industrial uses. Makes up 8.1% of the Earth's crust, by weight. Isolated in 1825 by H.C. Oersted.
Atomic Number13
Atomic Weight26.9815385
Mass Number27
Group13
Period3
Blockp
Protons13 p+
Neutrons14 n0
Electrons13 e-
Animated Bohr Model of Al (Aluminum)

Physical Properties

Atomic Radius
125 pm
Molar Volume
Covalent Radius
126 pm
Metallic Radius
125 pm
Ionic Radius
39 pm
Crystal Radius
53 pm
Van der Waals Radius
184 pm
Density
2.7 g/cm³
Atomic Radii of the Elements: Aluminum0102030405060708090100110120130140150160170180190pmAtomic RadiusCovalent RadiusMetallic RadiusVan der Waals Radius

Chemical Properties

Energy
Proton Affinity
Electron Affinity
0.43283 eV/particle
Ionization Energy
5.9857684 eV/particle
Ionization Energies of Al (Aluminum)
Heat of Vaporization
284.1 kJ/mol
Heat of Fusion
10.75 kJ/mol
Heat of Formation
330.9 kJ/mol
Electrons
Electron Shells2, 8, 3
Bohr Model: Al (Aluminum)
Valence Electrons3
Lewis Structure: Al (Aluminum)
Electron Configuration[Ne] 3s2 3p1
1s2 2s2 2p6 3s2 3p1
Enhanced Bohr Model of Al (Aluminum)
Orbital Diagram of Al (Aluminum)
Oxidation States-2, -1, 0, 1, 2, 3
Electronegativity
1.61
Electrophilicity Index
0.9274010094475963 eV/particle
States of Matter
PhaseSolid
Gas Phase
Boiling Point
2,792.15 K
Melting Point
933.473 K
Critical Pressure
Critical Temperature
6,700.15 K
Triple Point
Visual

Aluminum is a Silver. Al has a CPK of #808090, Jmol of #bfa6a6, and MOLCAS GV of #bfa6a6. The Appearance of Element 13 is silvery gray metallic.

Color
Silver
Appearancesilvery gray metallic
Refractive Index
Thermodynamic Properties
Thermal Conductivity
Thermal Expansion
0.0000231 1/K
Molar Heat Capacity
Specific Heat Capacity
0.897 J/(g⋅K)
Heat Capacity Ratio (Adiabatic Index)
Electrical Properties
TypeConductor
Electrical Conductivity
38 MS/m
Electrical Resistivity
0.000000026 m Ω
Superconducting Point
1.175 K
Magnetism
Typeparamagnetic
Magnetic Susceptibility (Mass)
0.0000000078 m³/Kg
Magnetic Susceptibility (Molar)
0.00000000021 m³/mol
Magnetic Susceptibility (Volume)
0.0000211
Magnetic Ordering
Curie Point
Neel Point
Structure

The Crystal Structure of Aluminum is FCC. The lattice constant of Al is 4.05 Å. The lattice angles of Element 13 are π/2, π/2, π/2.

Crystal StructureFace Centered Cubic (FCC)
Lattice Constant
4.05 Å
Lattice Anglesπ/2, π/2, π/2
Mechanical Properties

Aluminum has a Brinell of 245 MPa, Mohs hardness of 2.75 MPa, and Vickers of 167 MPa. The Bulk Modulus of Al is 76 GPa. The Shear Modulus of Element 13 is 26 GPa. The Young Modulus of Aluminum (Al) is 70 GPa. The Poisson Ratio of Aluminum is 0.35. The Speed of Sound of Al is 5100 m/s.

Hardness
2.75 MPa
Bulk Modulus
76 GPa
Shear Modulus
26 GPa
Young's Modulus
70 GPa
Poisson Ratio
0.35
Speed of Sound
5,100 m/s
Classification

The CAS Group of Aluminum is IIIB. The IUPAC Group of Al is IIIA. The Glawe Number of Element 13 is 78. The Mendeleev Number of Aluminum (Al) is 82. The Pettifor Number of Aluminum is 80. The Geochemical Class of Al is major. The Goldschmidt Class of Element 13 is litophile.

CategoryPost-transition metals, Poor metals
CAS GroupIIIB
IUPAC GroupIIIA
Glawe Number78
Mendeleev Number82
Pettifor Number80
Geochemical Classmajor
Goldschmidt Classlitophile

Other

The Dipole Polarizability of Aluminum is 57.8 plus or minus 1 a₀. Al has a C6 Dispersion Coefficient (CD) of 528 a₀, and C6 Dispersion Coefficient (GB) of 520 a₀. The Allotropes of Element 13 is . The Neutron Cross Section of Aluminum (Al) is 0.233. The Neutron Mass Absorption of Aluminum is 0.03. The Quantum Numbers of Al is 2P1/2. The Space Group of Element 13 is 225 (Fm_3m).

Gas Basicity
Dipole Polarizability
57.8 ± 1 a₀
C6 Dispersion Coefficient
528 a₀
Allotropes
Neutron Cross Section
0.233
Neutron Mass Absorption
0.03
Quantum Numbers2P1/2
Space Group225 (Fm_3m)

Isotopes of Aluminum

Stable Isotopes1
Unstable Isotopes22
Natural Isotopes1

21Al

Mass Number21
Neutron Number8
Relative Atomic Mass
21.029082 ± 0.000644 Da
G-Factor
Abundance
Radioactivity☢️ Radioactive
Half Life
Spin5/2
Quadrupole Moment
Discovery Year
Parity+

Decay ModeIntensity
p (proton emission)

22Al

Mass Number22
Neutron Number9
Relative Atomic Mass
22.01954 ± 0.00043 Da
G-Factor
Abundance
Radioactivity☢️ Radioactive
Half Life
91.1 ± 0.5 ms
Spin4
Quadrupole Moment
Discovery Year1982
Parity

Decay ModeIntensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)55%
2p (2-proton emission)1.1%
β+α (β+-delayed α emission)0.038%

23Al

Mass Number23
Neutron Number10
Relative Atomic Mass
23.007244351 ± 0.00000037 Da
G-Factor
1.556 ± 0.008
Abundance
Radioactivity☢️ Radioactive
Half Life
446 ± 6 ms
Spin5/2
Quadrupole Moment
Discovery Year1969
Parity+

Decay ModeIntensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)1.22%

24Al

Mass Number24
Neutron Number11
Relative Atomic Mass
23.999947598 ± 0.000000244 Da
G-Factor
Abundance
Radioactivity☢️ Radioactive
Half Life
2.053 ± 0.004 s
Spin4
Quadrupole Moment
Discovery Year1953
Parity+

Decay ModeIntensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+α (β+-delayed α emission)0.035%
β+ p (β+-delayed proton emission)0.0016%

25Al

Mass Number25
Neutron Number12
Relative Atomic Mass
24.990428308 ± 0.000000069 Da
G-Factor
1.45788 ± 0.00048
Abundance
Radioactivity☢️ Radioactive
Half Life
7.1666 ± 0.0023 s
Spin5/2
Quadrupole Moment
0.24 ± 0.02
Discovery Year1953
Parity+

Decay ModeIntensity
β+ (β+ decay; β+ = ϵ + e+)100%

26Al

Mass Number26
Neutron Number13
Relative Atomic Mass
25.986891876 ± 0.000000071 Da
G-Factor
0.5606 ± 0.0008
Abundance
Radioactivity☢️ Radioactive
Half Life
717 ± 24 ky
Spin5
Quadrupole Moment
0.26 ± 0.03
Discovery Year1934
Parity+

Decay ModeIntensity
β+ (β+ decay; β+ = ϵ + e+)100%

27Al

Mass Number27
Neutron Number14
Relative Atomic Mass
26.981538408 ± 0.00000005 Da
G-Factor
1.45628 ± 0.000008
Abundance
100
RadioactivityStable
Half LifeNot Radioactive ☢️
Spin5/2
Quadrupole Moment
0.1466 ± 0.001
Discovery Year1922
Parity+

28Al

Mass Number28
Neutron Number15
Relative Atomic Mass
27.981910009 ± 0.000000052 Da
G-Factor
1.0803333333333 ± 0.0016666666666667
Abundance
Radioactivity☢️ Radioactive
Half Life
2.245 ± 0.005 m
Spin3
Quadrupole Moment
0.172 ± 0.012
Discovery Year1934
Parity+

Decay ModeIntensity
β (β decay)100%

29Al

Mass Number29
Neutron Number16
Relative Atomic Mass
28.980453164 ± 0.00000037 Da
G-Factor
Abundance
Radioactivity☢️ Radioactive
Half Life
6.56 ± 0.06 m
Spin5/2
Quadrupole Moment
Discovery Year1939
Parity+

Decay ModeIntensity
β (β decay)100%

30Al

Mass Number30
Neutron Number17
Relative Atomic Mass
29.982969171 ± 0.000002077 Da
G-Factor
1.004 ± 0.0023333333333333
Abundance
Radioactivity☢️ Radioactive
Half Life
3.62 ± 0.06 s
Spin3
Quadrupole Moment
Discovery Year1961
Parity+

Decay ModeIntensity
β (β decay)100%

31Al

Mass Number31
Neutron Number18
Relative Atomic Mass
30.983949754 ± 0.0000024 Da
G-Factor
1.5328 ± 0.002
Abundance
Radioactivity☢️ Radioactive
Half Life
644 ± 25 ms
Spin5/2
Quadrupole Moment
0.134 ± 0.002
Discovery Year1971
Parity+

Decay ModeIntensity
β (β decay)100%
β n (β-delayed neutron emission)1.6%

32Al

Mass Number32
Neutron Number19
Relative Atomic Mass
31.988084338 ± 0.0000077 Da
G-Factor
1.953 ± 0.002
Abundance
Radioactivity☢️ Radioactive
Half Life
32.6 ± 0.5 ms
Spin1
Quadrupole Moment
0.0255 ± 0.0003
Discovery Year1971
Parity+

Decay ModeIntensity
β (β decay)100%
β n (β-delayed neutron emission)0.7%

33Al

Mass Number33
Neutron Number20
Relative Atomic Mass
32.990877685 ± 0.0000075 Da
G-Factor
1.636 ± 0.002
Abundance
Radioactivity☢️ Radioactive
Half Life
41.46 ± 0.09 ms
Spin5/2
Quadrupole Moment
0.141 ± 0.003
Discovery Year1971
Parity+

Decay ModeIntensity
β (β decay)100%
β n (β-delayed neutron emission)8.5%

34Al

Mass Number34
Neutron Number21
Relative Atomic Mass
33.996781924 ± 0.000002259 Da
G-Factor
0.53925 ± 0.004
Abundance
Radioactivity☢️ Radioactive
Half Life
53.73 ± 0.13 ms
Spin4
Quadrupole Moment
Discovery Year1977
Parity-

Decay ModeIntensity
β (β decay)100%
β n (β-delayed neutron emission)26%
2n (2-neutron emission)

35Al

Mass Number35
Neutron Number22
Relative Atomic Mass
34.999759816 ± 0.0000079 Da
G-Factor
Abundance
Radioactivity☢️ Radioactive
Half Life
38.16 ± 0.21 ms
Spin5/2
Quadrupole Moment
Discovery Year1979
Parity+

Decay ModeIntensity
β (β decay)100%
β n (β-delayed neutron emission)35.8%
2n (2-neutron emission)

36Al

Mass Number36
Neutron Number23
Relative Atomic Mass
36.006388 ± 0.0001605 Da
G-Factor
Abundance
Radioactivity☢️ Radioactive
Half Life
90 ± 40 ms
Spin
Quadrupole Moment
Discovery Year1979
Parity

Decay ModeIntensity
β (β decay)100%
β n (β-delayed neutron emission)31%
2n (2-neutron emission)

37Al

Mass Number37
Neutron Number24
Relative Atomic Mass
37.010531 ± 0.0001935 Da
G-Factor
Abundance
Radioactivity☢️ Radioactive
Half Life
11.4 ± 0.3 ms
Spin5/2
Quadrupole Moment
Discovery Year1979
Parity+

Decay ModeIntensity
β (β decay)100%
β n (β-delayed neutron emission)52%
2n (2-neutron emission)1%

38Al

Mass Number38
Neutron Number25
Relative Atomic Mass
38.017681 ± 0.000161 Da
G-Factor
0
Abundance
Radioactivity☢️ Radioactive
Half Life
9 ± 0.7 ms
Spin0
Quadrupole Moment
0
Discovery Year1989
Parity-

Decay ModeIntensity
β (β decay)100%
β n (β-delayed neutron emission)84%
2n (2-neutron emission)

39Al

Mass Number39
Neutron Number26
Relative Atomic Mass
39.02307 ± 0.000322 Da
G-Factor
Abundance
Radioactivity☢️ Radioactive
Half Life
7.6 ± 1.6 ms
Spin5/2
Quadrupole Moment
Discovery Year1989
Parity+

Decay ModeIntensity
β (β decay)100%
β n (β-delayed neutron emission)97%
2n (2-neutron emission)

40Al

Mass Number40
Neutron Number27
Relative Atomic Mass
40.03094 ± 0.000322 Da
G-Factor
Abundance
Radioactivity☢️ Radioactive
Half Life
Spin
Quadrupole Moment
Discovery Year1996
Parity

Decay ModeIntensity
β (β decay)
β n (β-delayed neutron emission)
2n (2-neutron emission)

41Al

Mass Number41
Neutron Number28
Relative Atomic Mass
41.037134 ± 0.000429 Da
G-Factor
Abundance
Radioactivity☢️ Radioactive
Half Life
Spin5/2
Quadrupole Moment
Discovery Year1997
Parity+

Decay ModeIntensity
β (β decay)
β n (β-delayed neutron emission)
2n (2-neutron emission)

42Al

Mass Number42
Neutron Number29
Relative Atomic Mass
42.045078 ± 0.000537 Da
G-Factor
Abundance
Radioactivity☢️ Radioactive
Half Life
Spin
Quadrupole Moment
Discovery Year2007
Parity

Decay ModeIntensity
β (β decay)
β n (β-delayed neutron emission)
2n (2-neutron emission)

43Al

Mass Number43
Neutron Number30
Relative Atomic Mass
43.05182 ± 0.000644 Da
G-Factor
Abundance
Radioactivity☢️ Radioactive
Half Life
Spin5/2
Quadrupole Moment
Discovery Year2007
Parity+

Decay ModeIntensity
β (β decay)
β n (β-delayed neutron emission)
2n (2-neutron emission)
Aluminium-4
Aluminium bar surface etched

History

In 1761, Guyton de Morveau proposed the name alumine for the base in alum, and Antoine Lavoisier, in 1787, thought this to be the oxide of a still undiscovered metal. Sir Humphry Davy identified the existence of a metal base of alum in 1808. Hans Christian Ørsted was the first to isolate metallic aluminum in 1825 in impure form. Friedrich Wöhler is generally credited with having isolated the metal in 1827. From the Latin word alumen, alum

DiscoverersHans Christian Oersted
Discovery LocationDenmark
Discovery Year1825
Etymology (Name Origin)Latin: alumen, aluminis, (alum).
Pronunciationah-LOO-men-em (English)
Aluminum is not known to be toxic
Aluminum does not stick to magnets under normal conditions

Uses

Aluminum is used in an extensive range of products from drinks cans to window frames and boats to aircraft. It is used in electrical transmission lines. It is also used for kitchen utensils, outside building decoration, and in thousands of industrial applications. When alloyed with small amounts of copper, magnesium, silicon, manganese, or other elements impart a variety of useful properties. Used for many purposes from airplanes to beverage cans. Too soft in its pure form so less than 1% of silicon or iron is added, which hardens and strengthens it.

Sources

Never occurs in free form. Obtained by electrolysis from bauxite (Al2O3).

Abundance
Abundance in Earth's crust
82,300 mg/kg
Natural Abundance (Oceans)
0.002 mg/L
Natural Abundance (Human Body)
0.00009 %
Natural Abundance (Meteor)
0.91 %
Natural Abundance (Sun)
0.006 %
Abundance in Universe
0.005 %

Nuclear Screening Constants

1s0.409
2p4.0366
2s4.7864
3p8.9344
3s8.8828

Also Known As

  • Al
  • element 13
  • 13Al
  • aluminum

Translations

  • Italianalluminio
  • Norwegian Bokmålaluminium
  • Russianалюминий
  • Frenchaluminium
  • GermanAluminium
  • Dutchaluminium
  • Chinese (Traditional)
  • Spanishaluminio
  • Afrikaansaluminium
  • Amharicአሉምንም
  • Aragonesealuminio
  • Arabicألومنيوم
  • Asturianaluminiu
  • Azerbaijanialüminium
  • Belarusianалюміній
  • Bulgarianалуминий
  • Banglaঅ্যালুমিনিয়াম
  • Bretonaluminiom
  • Bosnianaluminij
  • Catalanalumini
  • CherokeeᎦᏌᎧ ᏔᎷᎩᏍᎩ
  • Central Kurdishفافۆن
  • Corsicanalluminiu
  • Czechhliník
  • Chuvashалюмини
  • Welshalwminiwm
  • Danishaluminium
  • Greekαργίλιο
  • Esperantoaluminio
  • Estonianalumiinium
  • Basquealuminio
  • Persianآلومینیم
  • Finnishalumiini
  • Northern FrisianAluminium
  • Friulianalumini
  • Western Frisianaluminium
  • Irishalúmanam
  • Scottish Gaelicalmain
  • Galicianaluminio
  • Manxollymin
  • Hakka Chinese
  • Hawaiian‘aluminuma
  • Hebrewאלומיניום
  • Hindiएल्युमिनियम
  • Fiji Hindialuminium
  • Croatianaluminij
  • Haitian Creolealiminyòm
  • Hungarianalumínium
  • Armenianալյումին
  • Interlinguaaluminium
  • Indonesianaluminium
  • Idoaluminio
  • Icelandicál
  • Japaneseアルミニウム
  • Lojbanjinmrmalume
  • Javanesealumunium
  • Georgianალუმინი
  • Kazakhалюминий
  • Kannadaಅಲ್ಯೂಮಿನಿಯಮ್
  • Korean알루미늄
  • ColognianAllu
  • Kurdishbafûn
  • Komiалюминий
  • Latinaluminium
  • LuxembourgishAluminium
  • Lezghianалюминий
  • Ligurianalluminio
  • Lombardalümìnio
  • Lithuanianaliuminis
  • Latvianalumīnijs
  • Malagasyviraty
  • Macedonianалуминиум
  • Malayalamഅലൂമിനിയം
  • Mongolianхөнгөн цагаан
  • Marathiएल्युमिनियम
  • Western Mariалюминий
  • Malayaluminium
  • Burmeseအလူမီနီယမ်
  • ErzyaЛюм
  • Low GermanAluminium
  • Nepaliएलुमिनियम
  • Newariएलुमिनियम
  • Norwegian Nynorskaluminium
  • Novialaluminie
  • Navajobéésh ászólí
  • Occitanalumini
  • Osseticалюмини
  • Punjabiਅਲਮੀਨੀਅਮ
  • Pampangaaluminiu
  • Polishglin
  • Western Panjabiالومینیم
  • Pashtoالومېنيم
  • Portuguesealumínio
  • Quechuach'aqu q'illay
  • Romanianaluminiu
  • Rusynалуміній
  • Kinyarwandaaluminiyumu
  • Yakutалүминиум
  • Sicilianaluminiu
  • Serbo-Croatianaluminijum
  • Slovakhliník
  • Slovenianaluminij
  • Albanianalumini
  • Serbianалуминијум
  • Saterland FrisianAluminium
  • Sundanesealuminium
  • Swedishaluminium
  • Swahilialumini
  • Tamilஅலுமினியம்
  • Teluguఅల్యూమినియం
  • Tajikалюминий
  • Thaiอะลูมิเนียม
  • Tagalogaluminyo
  • Turkishalüminyum
  • Uyghurئاليۇمىن
  • Ukrainianалюміній
  • Urduایلومینیم
  • Uzbekaluminiy
  • Vepsalüminii
  • Vietnamesenhôm
  • Warayaluminyo
  • KalmykГицан
  • Yiddishאלומיניום
  • Yorubaalumíníọ̀mù
  • Chinese
  • Cebuanoaluminio
  • Laoອາລູມິນຽມ
  • Tatarәлүмин
  • Bashkirалюминий
  • Odiaଆଲୁମିନିଅମ
  • Gujaratiસ્ફટયાતુ
  • Scotsaluminium
  • Piedmontesealumini
  • German (Switzerland)Aluminium
  • English (Canada)aluminum
  • English (United Kingdom)aluminium
  • Kikuyualuminium
  • Portuguese (Brazil)alumínio
  • Cantonese
  • Chinese (Hong Kong SAR China)
  • Chinese (China)
  • Min Nan Chinesea-lú-mih
  • Somalialumiiniyaam
  • Literary Chinese
  • Võroalumiinium
  • Belarusian (Taraskievica orthography)алюмін
  • Samogitianaliomėnis
  • Khmerអាលុយមីញ៉ូម
  • Sinhalaඅලුමෙනියම්
  • Chinese (Taiwan)
  • Chinese (Simplified)
  • Aromanianaluminiu
  • Faroesealuminium
  • Ilokoaluminio
  • cdolé̤ṳ
  • Limburgishalleminium
  • Swiss GermanAluminium
  • Kyrgyzалюминий
  • Zhuanglij
  • Sanskritएलुमिनियम
  • Maltesealuminju
  • Romanshaluminium
  • Paliएलुमिनियम
  • azbآلومینیوم
  • Bhojpuriअल्मुनिया
  • Tibetanཧ་ཡང་།
  • Buriatхүнгэн сагаан
  • Assameseএলুমিনিয়াম
  • Jamaican Creole Englishaluuminom
  • oloal'umiinii
  • kbpalimiiniyɔɔm
  • Lingua Franca Novaaluminio
  • Wu Chinese
  • hywպաղլեղածին
  • Extremaduranaluminiu
  • gcraluminium
  • Sardinianallumìniu
  • Chinese (Singapore)
  • Chinese (Malaysia)
  • Chinese (Macao SAR China)
  • Tatar (Cyrillic)әлүмин
  • Tuvinianалюминий
  • Moroccan Arabicآلومينيوم
  • Northern Samialumiidna
  • Egyptian Arabicالومنيوم
  • Cornishaluminiom
  • Upper Sorbianaluminij
  • Bikolalumino
  • lldalumìnium
  • Manipuriꯀꯣꯟꯉꯧ
  • Minangkabaualuminium
  • Balinesealuminium
  • Crimean Tataralümin
  • English (United States)aluminum
  • DinkaBau
  • GuaraniItatĩmembe
  • InterlingueAluminium
  • Tachelhitlamanyu
  • Gandaaluminiyamu
  • Korean (North Korea)알루미니움
  • blkအလူမီနီယမ်
  • Malay (Arabic)الومينيوم
  • ZuluisAlumbe
  • Kabylealuminyum
  • OromoSaldaqaa