91
231.036
Pa
Protactinium

Protactinium

15.4
231.036
[Rn] 5f26d17s2
231Pa
7
f
91
2, 8, 18, 32, 20, 9, 2
568.3
Pa
15.4
1572°C, 2862°F, 1845 K
4000°C, 7232°F, 4273 K
Kasimir Fajans and Otto Göhring
1913
7440-13-3
22387
More Information
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Atomic Data

Atomic Radiues, Non-bonded (A): 2.43
Electron Affinity (kJ mol-1): Unknown
Covalent Radiues (A): 1.84
Electronegativity (Pauling Scale): 1.5
Ionisation Energies (kJ mol-1) 1st 2nd 3rd 4th 5th 6th 7th 8th
568.3 - - - - - - -

Oxidation States and Isotopes

Common oxidation states 1
Isotope Atomic Mass Natural Abundance Half Life Mode of Decay
231Pa 231.036 100 3.25 x 104 y α
> 2 x 1017 y sf

Supply Risk

Relative Supply Risk: Unknown
Crustal Abundance (ppm): 0.0000014
Recycle Rate (%): Unknown
Production Conc.(%) : Unknown
Top 3 Producers:
Unknown
Top 3 Reserve Holders:
Unknown
Substitutability: Unknown
Political Stability of Top Producer: Unknown
Political Stability of Top Reserve Holder: Unknown

Pressure and Temperature Data

Specific Heat Capacity: Unknown
Shear Modulus: Unknown
Young Modulus: Unknown
Bulk Modulus: Unknown
Pressure 400k Pressure 600k Pressure 800k Pressure 1000k Pressure 1200k Pressure 1400k Pressure 1600k Pressure 1800k Pressure 2000k Pressure 2200k Pressure 2400k
- - - - - - 3.44 x 10-10 8.06 x 10-8 5.57 x 10-6 0.000174 Unknown