Information

Lithium (Li) properties


Atomic mass, symbol and atomic number

lithium is a naturally occurring element with the element symbol Li and the atomic number 3. In the periodic table it stands with an atomic mass of 6.94 u in the 1st main group. The chemical element discovered by Johan August Arfwedson in 1817 is not radioactive and is in a solid state of aggregation at room temperature.

Profile: Lithium (English: Lithium)

General
Chemical element:lithium
Symbol:Li
Atomic number:3
Group:Alkali metal group
Period:2
Block:s block
Series:alkali metals
Appearance:silver
explorers:Johan August Arfwedson
Year of discovery:1817
Atomic properties
Atomic mass:6,94 u
Atomic radius:145 pm
Covalent radius:128 pm
Van der Waals radius:182 pm
Electron configuration:Hey 2s1
ionization:520.2 kJ / mol
Physical Properties
Physical state:firmly
Density:0.534 g / cm3
Crystal structure:cubic
Magnetism:paramagnetic
molar volume:13,02 · 10-6 m3/ mol
Mohs hardness:0,6
Melting point:180 ° C
Boiling point:1330 ° C
Heat of fusion:3 kJ / mol
Heat of vaporization:136 kJ / mol
Thermal conductivity:85 W
Chemical properties
electronegativity:0,98

Did you know that ...

  • if you burn lithium the flame glows bright red?
  • the word lithium derives from the ancient greek "lithos" and means "asleep"?
  • Lithium salts are used in medicine as phase prophylactics for depression?
  • Lithium compounds used for batteries and rechargeable batteries?