Basic Information

Name: Francium 
Symbol: Fr 
Atomic Number: 87 
Atomic Mass: (223.0) amu 
Melting Point: 27.0 °C (300.15 K, 80.6 °F) 
Boiling Point: 677.0 °C (950.15 K, 1250.6 °F) 
Number of Protons/Electrons: 87 
Number of Neutrons: 136 
Classification: Alkali Metal 
Crystal Structure: Cubic 
Density @ 293 K: Unknown 
Color: Unknown
Date of Discovery: 1939 
Discoverer: Marguerite Derey 
Name Origin: After France 
Uses: No uses known 
Obtained From: decay of actinium