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Metal > AluminiumAl - Aluminum A common metal comprising nearly ten percent of the crust of the earth, aluminum has been known since its preparation by Hans Oerstead 1825. Reactions of aluminum are investigated in fundimental and general chemistry. Atomic number - 13 Density g/mL 2 .7 Atomic weight u 26 .98154 Melting point K 933 .25 Bonding radius A 1 .18 Boiling point K 2740 Atomic radius A 1 .82 Heat of vaporization kJ/mol 293 .4 Ionization Potential V 5 .986 Heat of fusion kJ/mol 10 .79 Electronegativity - 1 .61 Specific heat J/gK 0 .9 The oxide is amphoteric. Crystal are face centered cubic. Electron config. : [Ne] 3s2 3p1
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