Information valid for Pr-141 unless otherwise noted

Praseodymium

Basic Information

Symbol: Pr
Atomic Number: 59
Mass: 140.90765
Melting Point: 935.0 C
Boiling Point: 3127.0 C
Number of Protons/Electrons: 59
Number of Neutrons: 82
Classification: Rare Earth
Crystal Structure: Hexagonal
Density @ 293 K: 6.77 g/cm³
Color: Unknown

Atomic Structure

Number of Energy Levels: 6 First Energy Level: 2 Second Energy Level: 8 Third Energy Level: 18 Fourth Energy Level: 21 Fifth Energy Level: 8 Sixth Energy Level: 2

Isotopes

Facts

Date of Discovery: 1885
Discoverer: C.F. Aver von Welsbach
Name Origin: From the Greek words prasios (green) and didymos (twin)
Uses: coloring glass and ceramics
Obtained From: salts