Materials Home
Pure Elements
Periodic Table
Element List
  by Name
  by Symbol
  by Atomic Number
  by Atomic Weight
Element Information
Resources
Bibliography
CNC Machining Design Guide

Optimize your designs, reduce machining time, and lower your costs.

Negotiate Your Salary

Learn the best principles to negotiate the salary you deserve!

Reinforced Plastics

Informed and impartial coverage on the global composites industry.

Power Transmission

Gear drives, bearings, motors, clutches, couplings, machine controls, sensors and components.

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