11
Na
sodium
22.990

General properties

Group
group 1 (H and alkali metals)
Period
period 3
Category
alkali metals
Standard atomic weight
22.989 769 28(2)
Melting point
370.944 K (97.794 °C)
Boiling point
1156.090 K (882.940 °C)
Phase at STP
solid

Additional properties

Block
s-block
Electron configuration
[Ne] 3s¹
Electrons per shell
2, 8, 1
Electronegativity
0.93
Density
0.968 g/cm³
Oxidation states
−1, +1 (a strongly basic oxide)
CAS Number
7440-23-5