Fe - Iron

The Iron Age was underway by 1000 BC; since then, the history of our technology based civilization has been the history of iron. Iron's strength was its first virtue and it's ferromagnetic properties are a gift. Iron is not without drawbacks, however. When in the presence of water, iron readily reacts with oxygen, making rust: a brittle, flimsy, red powder which is mostly useless.

 

Atomic number - 26 Density g/mL 7 .86
Atomic weight u 55 .847 Melting point K 1809
Bonding radius A 1 .17 Boiling point K 3135
Atomic radius A 1 .72 Heat of vaporization kJ/mol 349 .6
Ionization Potential V 7 .87 Heat of fusion kJ/mol 13 .8
Electronegativity - 1 .83 Specific heat J/gK 0 .44
The oxide is amphoteric.
Crystal are body centered cubic.

Electron config. : [Ar] 3d6 4s2


Isotopes of Fe: Click mass number for decay process, product for element page.


046
20 msec
ECp,7.603 MeV
Cr-45
46.000858
047
27 msec
ECp,7.520 MeV
Cr-46
46.992914
049
75 msec
EC/ECp,13.030
Mn-49/Cr-48
48.973612
050
150 msec
EC/ECp,8.150
Mn-50/Cr-49
49.962994
051
305 msec
EC,8.020 MeV
Mn-51
50.956825
052
8.275 hr
EC,2.372 MeV
Mn-52
51.948116
052a
45.9 sec
EC,9.192 MeV
Mn-52
51.955438
053
8.51 min
EC,3.743 MeV
Mn-53
52.945312
054 5.845%

Stable

53.939614
055
2.73 yr
EC,2.603 MeV
Mn-55
54.938298
056 91.754%

Stable

55.934941
057 2.119%

Stable

56.935398
058 0.282%

Stable

57.933280
059
44.503 da
B-,1.565 MeV
Co-59
58.934880
060
1.5E+6 yr
B-,8.902 MeV
Co-60
59.934076
061
5.98 min
B-,3.978 MeV
Co-61
60.936748
062
68 sec
B-,2.530 MeV
Co-62
61.936770
063
6.1 sec
B-,6.320 MeV
Co-63
62.940407
064
2.0 sec
B-,4.700 MeV
Co-64
63.940847
065
0.4 sec
B-,7.900 MeV
Co-65
64.944927
067
200 nsec
B-,8.700 MeV
Co-67
66.949972
068
0.10 sec
B-,7.600 MeV
Co-68
67.952549
MASS abund.
Halflife
Particle, Energy
Decay Product(s)
Isotopic Mass