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