The Element Protactinium

What is Protactinium? Element Properties & Periodic Table Info

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Definition of the Protactinium Element
A short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into
Lead. It does not tarnish rapidly in air, it is attacked by Oxygen, steam and acids, but not by alkalis. It is superconductive at temperatures below 1.4 K. The Atomic Number of this element is 91 and the Element Symbol is Pa.

Origin / Meaning of the name Protactinium
The name originates from the Greek word 'protos' meaning first and actinium, since it was found to be the parent of actinium.

 

Periodic Table Group and Classification of the of the Protactinium Element
Elements can be classified based on their physical states (States of Matter) e.g. gas, solid or liquid. This element is a solid. Protactinium is 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. Nearly 75% of all the elements in the Periodic Table are classified as metals which are detailed in the List of Metals.

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

History of the Periodic Table
Check out the brief History of the Periodic Table which details dates and the names of famous scientists and chemists who contributed to the development of the Periodic Table.

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

Abundances of the element in different environments
% in Universe N/A
% in Sun N/A
% in Meteorites N/A
% in Earth's Crust 9.910-13%
% in Oceans 210-23%
% in Humans None

Associated Uses of Protactinium
Basic scientific research

Pa

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

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 as on 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 as on the Periodic Table 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.

What is 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 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.

Learn about what is Protactinium with these fast facts...
These articles contain facts and information relating to Protactinium and each of the other elements including the Periodic Symbol,  group, classification, properties and atomic number which is often referred to as the Periodic Table Number. Test your knowledge of chemistry and the Periodic Table by completing the Element Symbols and Atomic Numbers on our Blank Periodic Table. Chemistry students will also find a helpful section on Chemical Formulas.

What is the Element Protactinium

The Elements are the building blocks of Modern Science & Chemistry


 

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