| Group | ||||
|---|---|---|---|---|
| f2 | f3 | f4 | ||
| Period | 6 |
58
Ce
Cerium
[Xe] 6s2 4f1 5d1
|
59
Pr
Praseodymium
[Xe] 6s2 4f3
Name origin:
the Greek 'prasios didymos' meaning green twin
Atomic weight (amu):
140.90765
Specific heat capacity (J/gK):
0.193
Density (g/cm3):
6.773
Melting point (K):
1208.0
Boiling point (K):
3793.0
Electronegativity (Pauling):
1.13
Abundance (mg/kg):
9.2
|
60
Nd
Neodymium
[Xe] 6s2 4f4
|
| 7 |
91
Pa
Protactinium
[Rn] 7s2 5f2 6d1
|
|||
Tip: Hover over an adjacent element to compare its electron configuration to that of the central element.