3 - Lithium alkali metal

Discovered by Johan August Arfwedson in 1817

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Lithium

Lithium (from Greek:λίθος lithos, "stone") is a chemical element with the symbol Li and atomic number 3. It is a soft, silver-white metal belonging to the alkali metal group of chemical elements. Under standard conditions it is the lightest metal and the least dense solid element.

Periodic table

 Shell Electrons Orbitals
122 in 1s
211 in 2s

Electron shells

silvery-white Appearance
6.94  u Atomic Mass
1.45  Å Atomic Radius
1.62k  K Boiling Point
1 Group
1 Common Oxidation States
1.28  Å Covalent Radius
0.534  g/cm³ Density
59.6  kJ/mol Electron Affinity
1s2 2s1 Electron Configuration
[He] 2s1 Electron Configuration (semantic)
0.98 Electronegativity
3 Electrons
5.39  eV First Ionization Energy
1 ICSD Oxidation States
520.2, 7298.1, 11815  kJ/mol Ionization Energies
454  K Melting Point
12 Mendeleev Number
24.9  J/(mol·K) Molar Heat
2 Number of Shells
1 Electron Valency
4 Neutrons
3 Atomic Number
5 Number of Isotopes
1 Oxidation States
2 Period
Solid Phase
3 Protons
2, 1 Electron Shell Occupations
3.58  J/(g K) Specific Heat