| Group | ||||
|---|---|---|---|---|
| f3 | f4 | f5 | ||
| Period | 6 |
59
Pr
Praseodymium
[Xe] 6s2 4f3
|
60
Nd
Neodymium
[Xe] 6s2 4f4
Name origin:
the Greek 'neos didymos' meaning new twin
Atomic weight (amu):
144.242
Specific heat capacity (J/gK):
0.19
Density (g/cm3):
7.007
Melting point (K):
1297.0
Boiling point (K):
3347.0
Electronegativity (Pauling):
1.14
Abundance (mg/kg):
41.5
|
61
Pm
Promethium
[Xe] 6s2 4f5
|
| 7 |
92
U
Uranium
[Rn] 7s2 5f3 6d1
|
|||
Tip: Hover over an adjacent element to compare its electron configuration to that of the central element.