the chemical symbol for Lithium is Li in the periodic table and its atomic number is 3.
it belongs to the first group of the periodic table, second row and the block s.
it is a part of the alkali metals like the element Francium.
it is a stable element.
lithium comes from the greek word lithos which means a rock.
Atomic number (Z) 3
Group, block group 1 (alkali metals), s-block
Period: period 2
Element category: alkali metal
Standard atomic weight (Ar) 6.94 (6.938–6.997)
Electron configuration: [He] 2s1
per shell: 2, 1
Physical properties
Phase: solid
Melting point: 453.65 K (180.50 °C, 356.90 °F)
Boiling point: 1603 K (1330 °C, 2426 °F)
Density near r.t.: 0.534 g/cm3
when liquid, at m.p. 0.512 g/cm3
Critical point: 3220 K, 67 MPa (extrapolated)
Heat of fusion: 3.00 kJ/mol
Heat of vaporization: 136 kJ/mol
Molar heat capacity: 24.860 J/(mol·K)
Atomic properties
Oxidation states: +1 (a strongly basic oxide)
Electronegativity: Pauling scale: 0.98
Ionization energies 1st: 520.2 kJ/mol
2nd: 7298.1 kJ/mol
3rd: 11815.0 kJ/mol
Atomic radius empirical: 152 pm
Covalent radius: 128±7 pm
Van der Waals radius: 182 pm
Crystal structure: body-centered cubic
Speed of sound thin rod 6000 m/s (at 20 °C)
Thermal expansion: 46 µm/(m·K) (at 25 °C)
Thermal conductivity: 84.8 W/(m·K)
Electrical resistivity: 92.8 nΩ·m (at 20 °C)
Magnetic ordering: paramagnetic
Young's modulus: 4.9 GPa
Shear modulus: 4.2 GPa
Bulk modulus: 11 GPa
Mohs hardness: 0.6
Brinell hardness: 5 MPa
CAS Number 7439-93-2