Periodic Table

Protactinium

Atomic Number: 91

 
Overview
PropertyValueUnits

Atomic Mass

231.0359

Density

15.37

g/cckg/m3lb/in3
Thermal Properties

Thermal Properties

PropertyValueUnits

Melting Point

1568°C

K°C°F°R

Boiling Point

°C

K°C°F°R

Critical Pressure

The critical pressure has not been determined for Protactinium

Critical Temperature

The critical temperature has not been determined for Protactinium

Heat of Fusion

15 kJ/mol

kJ/molcal/mol

Heat of Vaporization

470 kJ/mol

kJ/molcal/mol

Specific Heat

99.1 J/kg·K

J/kg·K

Thermal Conductivity

47 W/m·K

W/m·K
Electon Configuration

Electron Structure

[Rn] 5f2 6d1 7s2

Shell Arrangement

KLMNOPQ
2818322092
LevelS OrbitalP OrbitalD OrbitalF Orbital
Level 1
Level 2
History

Year Discovered

1913

Isotopes
IsotopeCommon NameSymbolMassStatusAbundanceHalf-lifeDecay modeDecay EnergyNuclear SpinMagnetic Moment

Isotopic mass data for stable isotopes is from:
G. Audi, A.H. Wapstra in Nuclear Physics A, 1993, 565, 1-65
and
G. Audi, A.H.Wapstra in Nuclear Physics A, 1995, 595 409-480.

Natural abundance data is from:
K.J.R. Rosman, P.D.P. Taylor in Pure Appplied Chemistry, 1999, 71, 1593-1607.

 

Occurance
In the Universe0%
In the Sun0%
In Meteorites0%
In the Earth's Crust9.9E-12%
In Seawater2E-23%
In the Human Body0%
Models

Pictures, videos and 3D models of the element

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