Al - 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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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
H He
Li Be B C N O F Ne
Na Mg Al Si P S Cl Ar
K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe
Cs Ba La* Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn
Fr Ra Ac** Rf Db Sg Bh Hs Mt 110 111 112 113
Lanthanides* Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu
Actinides ** Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr

Isotopes of Al: Click mass number for decay process, product for element page.
022
70 msec
EC/EC2p/ECp,18.580
Mg-22/Ne-20/Na-21
22.019517 		023
0.47 sec
EC/ECp,12.240
Mg-23/Na-22
23.007267 		024
2.053 sec
EC/ECa,13.878
Mg-24/Ne-20
23.999940 		024a
131.3 msec
ECa,4.988 MeV
Ne-20
24.000398 		025
7.183 sec
EC,4.277 MeV
Mg-25
24.990428 		026
7.4E+5 yr
EC,4.004 MeV
Mg-26
25.986891 		027 100%

Stable

26.981538
028
2.2414 min
B-,4.642 MeV
Si-28
27.981910 		029
6.56 min
B-,3.680 MeV
Si-29
28.980444 		030
3.60 sec
B-,8.561 MeV
Si-30
29.982960 		031
644 msec
B-,7.995 MeV
Si-31
30.983946 		032
33 msec
B-,13.020 MeV
Si-32
31.988126 		034
60 msec
B-/B-n,17.090
Si-34/Si-33
33.996929 		035
150 msec
B-/B-n,14.300
Si-35/Si-34
34.999935
MASS abund.
Halflife
Particle, Energy
Decay Product(s)
Isotopic Mass

Updated by clh on 2/6/98. This is not a publication of Phoenix College.