Praseodymium

Statistics:

• Name: Praseodymium
• Symbol: Pr
• Classification: Lanthanide
• Atomic Number: 59
• Atomic Mass: 140.90765 g/mol
• Density: 6.48 g/cm³
• Melting: 931°C
• Boiling: 3212°C
• Protons & Electrons:59
• Neutrons:82
• Discovered: 1895
• Discovered By: von Welsbach
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Electrons Per Energy Level:

• Level 1: 2
• Level 2: 8
• Level 3: 18
• Level 4: 21
• Level 5: 8
• Level 6: 2

Isotopes:

Isotope: Half-life

• ¹⁴¹Pr: stable
• ¹⁴²Pr: 19.12 hours
• ¹⁴³Pr: 13.57 days
• ¹⁴⁴Pr: 17.28 minutes
• ¹⁴⁵Pr: 5.984 hours

Brief Summary

Praseodymium is a Lanthanide with the symbol 'Pr' and contains 59 Protons & Electrons with 82 neutrons in the nucleus of the atom. Praseodymium has an atomic mass of 140.90765 g/mol and, at a temperature of 20°C, has a density of 6.48 g/cm³. It will melt at a temperature of 931°C and boil at 3212°C.

Praseodymium was discovered by von Welsbach in 1895 and is named 'Praseodymium' Greek words "prasios" meaing "green" and "didymos" meaning "twin".

Some common usages for Praseodymium: coloring glass and ceramics.

Definitions and Notes

Density listed is at a temperature of 20°C.

Isotopes are forms of an element who have the same atomic number but different mass because they contain different number of neutrons.

Half-life is the time required for a quantity of a subject to fall to half of its current quantity.

MLA Citing Format

Praseodymium :: Pr :: 59 - Chemical Element. 10 Mar. 2010 <http://www.chemicalelement.com/element/praseodymium.html>.