Stable isotope Sodium (Na)

Isotope Z(p) N(n) Atomic Mass Natural Abundance Nuclear Spin
Na-23 11 12 22.9897697 100.00% 3/2+

Properties of Sodium

Name Sodium
Symbol Na
Atomic number 11
Atomic weight 22.989770
Standard state Solid at 298 °K
CAS Registry ID 7440-23-5
Group in periodic table 1
Group name Alkali metal
Period in periodic table 3
Block in periodic table s-block
Color Silvery white
Classification Metallic
Melting point 97.81 °C
Boiling point 882.9 °C
Thermal conductivity 1.42 W/(m·K) at 298.2 °K
Electrical resistivity 4.2 µΩ·cm at 0 °C
Electronegativity 0.9
Specific heat 1.21 kJ/kg K
Heat of vaporization 97.7 kJ·mol-1
Heat of fusion 2.6 kJ·mol-1
Density of solid 0.97 g/cm3
Electron configuration [Ne]3s1
Oxidation state +1
Atomic radius 1.85 Å
Ionic radius Na+: 1.02 Å (coordination number 6)
Ionization potential 5.139 eV