Lithium

Chaitra 26/06/2026 19:58:08 Updated 26/06/2026 19:58:08
Property Value
Atomic Number 3
Element Lithium
Symbol Li
Atomic Mass 6.94 u
Number of Neutrons 4 (most common isotope, Lithium-7)
Number of Protons 3
Number of Electrons 3
Period 2
Group 1
Phase Solid
Radioactive No
Natural Yes
Metal Yes
Nonmetal No
Metalloid No
Type Alkali Metal
Atomic Radius 167 pm
Electronegativity 0.98 (Pauling scale)
First Ionization Energy 5.392 eV
Density 0.534 g/cm³
Melting Point 180.54 °C
Boiling Point 1342 °C
Number of Isotopes 2 (Lithium-6, Lithium-7)
Discoverer Johan August Arfwedson
Year 1817
Specific Heat 3.582 J/g·K
Number of Shells 2
Number of Valence Electrons 1
Tags: Tutorials Chemistry tutorial step by step learn how to guide examples
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