Basic Information

Name: Magnesium 
Symbol: Mg 
Atomic Number: 12 
Atomic Mass: 24.305 amu 
Melting Point: 650.0 °C (923.15 K, 1202.0 °F) 
Boiling Point: 1107.0 °C (1380.15 K, 2024.6 °F) 
Number of Protons/Electrons: 12 
Number of Neutrons: 12 
Classification: Alkaline Earth 
Crystal Structure: Hexagonal 
Density @ 293 K: 1.738 g/cm3 
Color: grayish
Date of Discovery: 1808 
Discoverer: Sir Humphrey Davy 
Name Origin: Magnesia (City) 
Uses: airplanes, missiles 
Obtained From: sea water