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Magnesium


3
12
24.305
KEY
Chemical Element Symbol Key

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Magnesium
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Symbol: Mg
Atomic Number: 12
Atomic Weight: 24.305
Element Classification: Alkaline-earth Metal
Discovered By: Sir Humphrey Davy
Discovery Date: 1808 (England)
Name Origin: Magnesia, ancient city in district of Thessaly, Greece.
Density (g/cc): 1.738
Melting Point (K): 922
Boiling Point (K): 1363
Appearance: Lightweight, malleable, silvery-white metal
Atomic Radius (pm): 160
Atomic Volume (cc/mol): 14.0
Covalent Radius (pm): 136
Ionic Radius: 66 (+2e)
Specific Heat (@20°C J/g mol): 1.025
Fusion Heat (kJ/mol): 9.20
Evaporation Heat (kJ/mol): 131.8
Thermal Conductivity (@25°C W/m K):
Debye Temperature (K): 318.00
Pauling Negativity Number: 1.31
First Ionizing Energy (kJ/mol): 737.3
Oxidation States: 2
Electronic Configuration: [Ne] 3s2
Lattice Structure: Hexagonal (HEX
Lattice Constant (Å): 3.210
Lattice C/A Ratio: 1.624


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