Protactinium - Element Properties and Periodic Table Information

Protactinium - An element from the Periodic Table based on the IOUPAC 1985 standard

Chemical Elements

Periodic Table

Definition of the Protactinium Element
A short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead.

Origin / Meaning of the name Protactinium
The name originates from the Greek word 'protos' meaning first

Classification of the Protactinium Element
Protactinium classified as an element in the Actinide series as one of the "Rare Earth Elements" which can located in Group 3 elements of the Periodic Table and in the 6th and 7th periods. The Rare Earth Elements are of the Lanthanide and Actinide series. Most of the elements in the Actinide series are synthetic or man-made.

Facts about the Discovery and History of the Protactinium Element
Protactinium was discovered by Fredrich Soddy  in 1917

Occurrence the Protactinium Element
Obtained from fission product of plutonium, uranium & thorium,

Associated Uses of Protactinium
Basic scientific research
 

The Properties of the Protactinium Element
Symbol: Pa
Atomic Number: 91
Atomic Mass: 231.03587 amu
Melting Point: 1600.0 °C - 1873.15 °K
Boiling Point: Unknown
Number of Protons/Electrons: 91
Number of Neutrons: 140
Crystal Structure: Orthorhombic
Density @ 293 K: 15.4 g/cm3
Color: silver

Protactinium and the Periodic Table
Check out Protactinium on the Periodic Table which arranges each chemical element according to its atomic number, as based on the periodic law, so that chemical elements with similar properties are in the same column. Our Periodic Table is simple to use - just click on the symbol for Protactinium for additional information and for an instant comparison of the Atomic Weight, Melting Point, Boiling Point and Mass - G/cc with any other element. An invaluable source of facts and information as a Chemistry reference guide.

Protactinium - IUPAC and the Modern Standardised Periodic Table
The Standardised Periodic Table in use today was agreed by the International Union of Pure Applied Chemistry, IUPAC, in 1985 and now recognises more periods and elements than Dimitri  Mendeleev knew in his day but still all fitting into his concept of  the "Periodic Table" in which Protactinium is just one element that can be found.
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The Element Protactinium

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