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The Element Praseodymium


"The Atom"

Definition of the Praseodymium Element
A soft, silvery, malleable, ductile rare-earth element that develops a characteristic green tarnish in air. It is more resistant to corrosion in air the other rare metals, but it still needs to be stored under oil or coated with plastic. It occurs naturally with other rare earths in monazite and is used to color glass and ceramics yellow, as a core material for Carbonarcs, and in metallic alloys. The Atomic Number of this element is 59 and the Element Symbol is Pr.

The Properties of the Praseodymium Element
Symbol of Element : Pr
Atomic Number : 59
Atomic Mass: 140.90765 amu
Melting Point: 935.0 C - 1208.15 K
Boiling Point: 3127.0 C - 3400.15 K
Number of Protons/Electrons : 59
Number of Neutrons : 82
Crystal Structure: Hexagonal
Density @ 293 K: 6.77 g/cm3 
Color of Praseodymium : silvery

Origin / Meaning of the name Praseodymium
The name originates from the Greek words 'prasios' meaning green and 'didymos' meaning twin.

Periodic Table Group and Classification of the of the Praseodymium Element
Elements can be classified based on their physical states (States of Matter) e.g. gas, solid or liquid. This element is a solid. Praseodymium is classified as an element in the Lanthanide 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 divided into the Lanthanide and Actinide series. The elements in the Lanthanide series closely resemble lanthanum, and one another, in their chemical and physical properties. Their compounds are used as catalysts in the production of petroleum and synthetic products. 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 Praseodymium Element
Praseodymium was discovered by the Austrian chemist Baron Aver von Welsbach in 1885

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 Praseodymium Element
Found in the rare earth minerals monazite and bastnasite

Abundances of the element in different environments
% in Universe 210-7%
% in Sun 110-7%
% in Meteorites 9.810-6%
% in Earth's Crust 0.00086%
% in Oceans 610-11%
% in Humans N/A

Associated Uses of Praseodymium
Aircraft engines
Arc lights
Studio lighting

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