Protactinium

From Citizendium
Jump to navigation Jump to search
The printable version is no longer supported and may have rendering errors. Please update your browser bookmarks and please use the default browser print function instead.
This article is a stub and thus not approved.
 Main Article
 Discussion
Related Articles  [?]
Bibliography  [?]
External Links  [?]
Citable Version  [?]
Properties [?]
 
https://en.citizendium.org/wiki/index.php?title=Protactinium&printable=yes
This editable Main Article is under development and subject to a disclaimer.
Protactinium
231.03588(2)



  Pa
91
1s22s22p63s23p63d104s24p6 4d105s25p64f145d106s26p65f26d17s2
[ ? ] Actinide:
Hazard:
Radioactive and toxic.


Protactinium is a chemical element, having the chemical symbol Pa. Its atomic number (the number of protons) is 91. It has a standard atomic weight of 231.0359 g•mol −1 and it is a solid in its elemental form.

Protactinium is considered a member of the "Actinide" class of elements. At a pressure of 101.325 kPa, it has a boiling point of ~4,000 °C and a melting point of 1,572 °C.

Retrieved from "https://citizendium.org/wiki/index.php?title=Protactinium&oldid=739826"