| Group | ||||
|---|---|---|---|---|
| f4 | f5 | f6 | ||
| Period | 6 |
60
Nd
Neodymium
[Xe] 6s2 4f4
|
61
Pm
Promethium
[Xe] 6s2 4f5
Name origin:
Prometheus of Greek mythology who stole fire from the Gods and gave it to humans
Atomic weight (amu):
145.0
Specific heat capacity (J/gK):
Density (g/cm3):
7.26
Melting point (K):
1315.0
Boiling point (K):
3273.0
Electronegativity (Pauling):
1.13
Abundance (mg/kg):
0.001
|
62
Sm
Samarium
[Xe] 6s2 4f6
|
| 7 |
93
Np
Neptunium
[Rn] 7s2 5f4 6d1
|
|||
Tip: Hover over an adjacent element to compare its electron configuration to that of the central element.