Basic Information

Name: Plutonium 
Symbol: Pu 
Atomic Number: 94 
Atomic Mass: (244.0) amu 
Melting Point: 639.5 °C (912.65 K, 1183.1 °F) 
Boiling Point: 3235.0 °C (3508.15 K, 5855.0 °F) 
Number of Protons/Electrons: 94 
Number of Neutrons: 150 
Classification: Rare Earth 
Crystal Structure: Monoclinic 
Density @ 293 K: 19.84 g/cm3 
Color: Unknown
Date of Discovery: 1940 
Discoverer: G.T. Seaborg 
Name Origin: After the planet Pluto 
Uses: bombs, nuclear reactors 
Obtained From: some uranium ores, man-made