Materials Home
Pure Elements
Periodic Table
Element List
  by Name
  by Symbol
  by Atomic Number
  by Atomic Weight
Element Information
Resources
Bibliography
Reinforced Plastics

Informed and impartial coverage on the global composites industry.

Essentials of Manufacturing

Information, coverage of important developments and expert commentary in manufacturing.

Quality Magazine

Techniques to improve quality on the shop floor and in manufacturing planning.

NASA Tech Briefs

Innovations developed by NASA and its industry partners in a wide array of fields.

more free magazines
Protactinium
91
Pa
231.036
Atomic Number 91
Atomic Weight 231.036
Electron Config. 2-2-6-2-6-10-2-6-10-14-2-6-10-2-2-6-1-2
Electron configuration order: 1s-2s-2p-3s-3p-3d-4s-4p-4d-4f-5s-5p-5d-5f-6s-6p-6d-7s

Mechanical Properties Conditions
Phase Temp. (K) Pressure (Pa)
Density 15400 kg/m3 Solid  298.15 

Thermal Properties Conditions
Temp. (K) Pressure (Pa)
Melting Temperature 1845.15 K   101325 
Boiling Temperature 4300 K   101325 
Fusion Enthalpy 53.4 J/g 101325 
 
Glossary