11
22.99 u
Na
Sodium
Alkali Metal
Atomic Structure
Physical State
Group
1
Period
3
Block
s
Electron Configuration
[Ne] 3s¹
Physical Properties
Atomic Mass:
22.99 u
Electronegativity:
0.93
Atomic Radius:
227 pm
Ionization Energy:
5.139 eV
Density:
0.971 g/cm³
Melting Point:
370.87 K
Boiling Point:
1156 K
Historical Information
Discovered By:
Humphry Davy
Year Discovered:
1807