General | States | Energies | Oxidation & Electrons |Appearance & Characteristics
Reactions | Other Forms |Radius | Conductivity | Abundance
Encyclopedia Britannica articles


Name Aluminum Symbol Al
atomic number 13 Atomic weight 26.98154
Density @ 293 K 2.702 g/cm3 Atomic volume 10.0 cm3/mol
Group Metal discovered 1825


state (s, l, g) s
melting point 933.57 K boiling point 2740 K
Heat of fusion 10.790 kJ/mol Heat of vaporization 293.40 kJ/mol
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1st ionization energy 577.6 kJ/mole electronegativity 1.61
2nd ionization energy 1816.6 kJ/mole electron affinity 42.6 kJ/mole
3rd ionization energy 2744.7 kJ/mole Specific heat 0.90 J/gK
heat atomization 326 kJ/mole atoms

Oxidation & Electrons

Shells 2,8,3 electron configuration [Ne] 3s2 3p1
minimum oxidation number 0 maximum oxidation number 3
min. common oxidation no. 0 max. common oxidation no. 3
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Appearance & Characteristics

structure fcc: face-centered cubic color silvery
uses Al cans & foil,reflectors toxicity
hardness 2.8 mohs characteristics passivated: surface oxide


reaction with air mild, w/ht = Al2O3 reaction with 6M HCl mild, = H2, AlCl3
reaction with 6M HCl mild, = H2, AlCl3 reaction with 15M HNO3 passivated
reaction with 6M NaOH mild, = H2, [Al(OH)4]-
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Other Forms

number of isotopes 1 hydride(s) AlH3
oxide(s) Al2O3 chloride(s) AlCl3Al2Cl6


ionic radius (2- ion) pm ionic radius (1- ion) pm
atomic radius 143 pm ionic radius (1+ ion) pm
ionic radius (2+ ion) pm ionic radius (3+ ion) 67.5 pm
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thermal conductivity 237 J/m-sec-deg electrical conductivity 376.676 1/mohm-cm
polarizability 8.3 A^3


source Bauxite (oxide) rel. abund. solar system 4.929 log
abundance earth's crust 4.9 log cost, pure 1.8 $/100g
cost, bulk 0.12 $/100g
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World Wide Web presentation of Chemicool Periodic Table is © Copyright 1996-99 by David D. Hsu. Some data were provided by and used with the permission of JCE Software and is owned and copyright by the Division of Chemical Education, Inc. Additional data were provided by Perkin-Elmer through Peter Lykos of IIT. The information may not be redistributed without the permission of David Hsu or JCE Software.