Basic Information

Name: Barium 
Symbol: Ba 
Atomic Number: 56 
Atomic Mass: 137.327 amu 
Melting Point: 725.0 °C (998.15 K, 1337.0 °F) 
Boiling Point: 1140.0 °C (1413.15 K, 2084.0 °F) 
Number of Protons/Electrons: 56 
Number of Neutrons: 81 
Classification: Alkaline Earth 
Crystal Structure: Cubic 
Density @ 293 K: 3.51 g/cm3 
Color: Silver
Date of Discovery: 1808 
Discoverer: Sir Humphrey Davy 
Name Origin: From the Greek word barys (heavy) 
Uses: Medical applications, among others 
Obtained From: barytine, whiterite