| Group | ||||
|---|---|---|---|---|
| 7 | 8 | 9 | ||
| Period | 4 |
25
Mn
Manganese
[Ar] 4s2 3d5
|
26
Fe
Iron
[Ar] 4s2 3d6
Name origin:
the Anglo-Saxon name iren (ferrum in Latin)
Atomic weight (amu):
55.845
Specific heat capacity (J/gK):
0.449
Density (g/cm3):
7.874
Melting point (K):
1811.0
Boiling point (K):
3134.0
Electronegativity (Pauling):
1.83
Abundance (mg/kg):
56300.0
|
27
Co
Cobalt
[Ar] 4s2 3d7
|
| 5 |
44
Ru
Ruthenium
[Kr] 5s2 4d6
|
|||
Tip: Hover over an adjacent element to compare its electron configuration to that of the central element.