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13 magnesiumaluminiumsilicon


Lagyu, Symbulu, Numeru aluminium, Al, 13
Chemical seriespoor metals
Lupung, Period, Bloki 133, p
Standard atomic weight 26.9815386(8) g·mol−1
Electron configuration [Ne] 3s2 3p1
Electrons per shell 2, 8, 3
Physical properties
Density (near r.t.)2.70 g·cm−3
Liquid density at m.p.2.375 g·cm−3
Melting point933.47 K
(660.32 °C, 1220.58 °F)
Boiling point2792 K
(2519 °C, 4566 °F)
Heat of fusion10.71 kJ·mol−1
Heat of vaporization294.0 kJ·mol−1
Heat capacity(25 °C) 24.200 J·mol−1·K−1
Vapor pressure
P/Pa 1 10 100 1 k 10 k 100 k
at T/K 1482 1632 1817 2054 2364 2790
Atomic properties
Crystal structureface centered cubic
0.4032 nm
Oxidation states3
(amphoteric oxide)
Electronegativity1.61 (Pauling scale)
Ionization energies
1st: 577.5 kJ·mol−1
2nd: 1816.7 kJ·mol−1
3rd: 2744.8 kJ·mol−1
Atomic radius125 pm
Atomic radius (calc.)118 pm
Covalent radius118 pm
Magnetic orderingparamagnetic
Electrical resistivity(20 °C) 26.50 nΩ·m
Thermal conductivity(300 K) 237 W·m−1·K−1
Thermal expansion(25 °C) 23.1 µm·m−1·K−1
Speed of sound (thin rod)(r.t.) (rolled) 5000 m·s−1
Young's modulus70 GPa
Shear modulus26 GPa
Bulk modulus76 GPa
Poisson ratio0.35
Mohs hardness2.75
Vickers hardness167 MPa
Brinell hardness245 MPa
CAS registry number7429-90-5
Selected isotopes
Main article: Isotopes of aluminium
iso NA half-life DM DE (MeV) DP
26Al syn 7.17×105y β+ 1.17 26Mg
ε - 26Mg
γ 1.8086 -
27Al 100% Ing Al stable ya kambe ning 14 neutrons
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