11
Na
22.99
Sodium
Element 11 · 22.99 u · s-block
alkali metal
A highly reactive alkali metal. As sodium chloride (table salt), it is essential for animal life.
Phase (STP)
Solid
Melting Point
97.794 °C
Boiling Point
882.94 °C
Density
0.971 g/cm³
Electronegativity
0.93
Atomic Radius
180 pm
Ionization Energy
496 kJ/mol
Electron Affinity
53 kJ/mol
Discovered
1807 · Humphry Davy
Electron Configuration
[Ne] 3s1
Electron Orbitals
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