Sodium

Symbol: Na
Atomic Number: 11
Atomic Weight: 22.989768
Element Classification: Alkali Metal
Discovered By: Sir Humphrey Davy
Discovery Date: 1807 (England)
Name Origin: Medieval Latin: sodanum, (headache remedy); symbol from Latin natrium, (sodium carbonate).

Density (g/cc): 0.971
Melting Point (K): 370.96
Boiling Point (K): 1156.1
Appearance: Soft, silvery-white metal
Atomic Radius (pm): 190
Atomic Volume (cc/mol): 23.7
Covalent Radius (pm): 154
Ionic Radius: 97 (+1e)
Specific Heat (@20C J/g mol): 1.222
Fusion Heat (kJ/mol): 2.64
Evaporation Heat (kJ/mol): 97.9
Thermal Conductivity (@25C W/m K):
Debye Temperature (K): 150.00
Pauling Negativity Number: 0.93
First Ionizing Energy (kJ/mol): 495.6
Oxidation States: 1
Electronic Configuration: [Ne] 3s1
Lattice Structure: Body-Centered Cubic (BCC)
Lattice Constant (): 4.230
Lattice C/A Ratio: n/a

Hardness [no units]: 0.5
Brinell Hardness [/MN m-2]: 0.69
Vickers Hardness [/MN m-2]: no data

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