91

Pa

Protactinium
231.03588 (2)
 Historical Information

Protactinium is found in pitchblende and ores form Zaire and is one of the rarest and most expensive naturally occurring elements. Protactinium was identified by Fajans and GΔhring in 1913 who named the new element brevium ("brief").

Basic Information Shells
  • Name:Protactinium
  • Symbol: Pa
  • Atomic number: 91
  • Atomic weight: 231.03588 (2)
  • Standard state: solid at 298 K
  • Group in periodic table:
  • Group name:Actinoid
  • Period in periodic table: 7
  • Block in periodic table: f-block
  • Classification: Metallic
 Protactinium
Uses Trivia
  • It has no uses.

Protactinium is a highly toxic and radioactive rare earth metal that requires special handling. It is found in pitchblende and ores form Zaire and is one of the rarest and most expensive naturally occurring elements.