Element Name: Protactinium
Atomic No.: 91
State (298 K): solid
Uses: -----
Atomic Mass: 231.04 g/mol
Density: ?
B.P.: 4300 K
F.P.: 2113 K
Electronic Configuration: 1s
2
2s
2
2p
6
3s
2
3p
6
3d
10
4s
2
4p
6
4d
10
4f
14
5s
2
5p
6
5d
10
5f
2
6s
2
6p
6
6d
1
7s
2
Isotopes: ?
Electronegativity: 1.50
Radius: 161 pm (atomic)
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