Sodium (Na) properties

Atomic mass, symbol and atomic number

sodium is a naturally occurring element with the element symbol Na and the atomic number 11. In the periodic table it stands with an atomic mass of 22.989 u in the 1st main group. The chemical element discovered by Humphry Davy in 1807 is not radioactive and is in a solid state at room temperature.

Characteristics: sodium (English Sodium)

Chemical element:sodium
Symbol:N / A
Atomic number:11
Group:Alkali metal group
Block:s block
Series:alkali metals
explorers:Humphry Davy
Year of discovery:1807
Atomic properties
Atomic mass:22,989 u
Atomic radius:180 pm
Covalent radius:154 pm
Van der Waals radius:227 pm
Electron configuration:Ne 3s1
ionization:495.8 kJ / mol
Physical Properties
Physical state:firmly
Density:0.968 g / cm3
Crystal structure:cubic
molar volume:23,78 · 10-6 m3/ mol
Mohs hardness:0,5
Melting point:97 ° C
Boiling point:890 ° C
Heat of fusion:2.60 kJ / mol
Heat of vaporization:97.4 kJ / mol
Thermal conductivity:140 W
Chemical properties

Did you know that ...

  • Almost 3% of the earth's envelope is composed of sodium compounds, making it the most common salt?
  • Sea salt mainly consists of common salt or sodium chloride (NaCl)?
  • when burning sodium, the flame glows bright yellow?
  • Sodium used to be called sodium?
  • is between 80 and 120 g sodium in the human body?