Praseodymium
Symbol:Pr Atomic Number:59
History of Praseodymium
Praseodymium was discovered in 1885 by Carl F. Auer Von Welbach at Vienna. He split didymium and was left with praseodymium and neodymium. Soon praseodymium was used to make metals stronger to be used in aircraft engines.
Physical Properties
Atomic Mass:140.90765u+0.00002u
Density:6.77 per cubic centimeter
Atomic Radius:247pm
Boiling Point:6353F
Melting Point:1708F
Room Temperature: Solid
Conductivity:highly conductive
Appearance:silvery
Malleability:bendable
Hardness:soft
Other:white
Chemical Properties
Reactivity: Reacts slowly to cold water but fast to warm water
Flammability: Highly flammable if in the form of dust, fumes, or powder
Atomic Structure
Atomic Number:59
Mass Number:140.90765amu
Protons:59
Neutrons:89
Electrons:59
Element Applications & Uses
It is used in aircraft engines but can also used in glasses.
Isotopes
Pr141-stable
Pr143-13.57days
Pr145-7.3min
Compound
It has alloys that are used to form a Mischmetal and also used to make permanent magnets
Name and Symbol
Praseodymium's name comes from two Greek words which together mean green twin. Its symbol is just short for praseodymium.
Weird Info
It is used to color glass and can be found in some glasses
Sources
1)http://www.rsc.org/periodic-table/element/59/praseodymium
2)http://www.chemicalelements.com/elements/pr.html
3)http://education.jlab.org/itselemental/ele059.html
4)Periodic Table book from class
5)http://www.chemicool.com/elements/praseodymium.html