Iron

Koushik 26/06/2026 19:58:08 Updated 26/06/2026 19:58:08
Property Value
Atomic Number 26
Element Iron
Symbol Fe
Atomic Mass 55.845 u
Number of Neutrons 30 (most common isotope, Iron-56)
Number of Protons 26
Number of Electrons 26
Period 4
Group 8
Phase Solid
Radioactive No
Natural Yes
Metal Yes
Nonmetal No
Metalloid No
Type Transition Metal
Atomic Radius 156 pm
Electronegativity 1.83 (Pauling scale)
First Ionization Energy 7.902 eV
Density 7.87 g/cm³
Melting Point 1538 °C
Boiling Point 2862 °C
Number of Isotopes 4 stable (Iron-54, Fe-56, Fe-57, Fe-58)
Discoverer Known since ancient times
Year Unknown
Specific Heat 0.449 J/g·K
Number of Shells 4
Number of Valence Electrons 8
Tags: Tutorials Chemistry tutorial step by step learn how to guide examples
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