| Group | ||||
|---|---|---|---|---|
| f2 | f3 | f4 | ||
| 6 |
59
Pr
Praseodymium
[Xe] 6s2 4f3
|
|||
| Period | 7 |
90
Th
Thorium
[Rn] 7s2 6d2
|
91
Pa
Protactinium
[Rn] 7s2 5f2 6d1
Name origin:
the Greek 'protos', meaning first, as a prefix to the element actinium, which is produced through the radioactive decay of protactinium
Atomic weight (amu):
231.03588
Specific heat capacity (J/gK):
Density (g/cm3):
15.37
Melting point (K):
1841.0
Boiling point (K):
4300.0
Electronegativity (Pauling):
1.5
Abundance (mg/kg):
0.001
|
92
U
Uranium
[Rn] 7s2 5f3 6d1
|
Tip: Hover over an adjacent element to compare its electron configuration to that of the central element.