Copper

Chaitra 26/06/2026 19:58:08 Updated 26/06/2026 19:58:08
Property Value
Atomic Number 29
Element Copper
Symbol Cu
Atomic Mass 63.546 u
Number of Neutrons 35 (most common isotope, Copper-63)
Number of Protons 29
Number of Electrons 29
Period 4
Group 11
Phase Solid
Radioactive No
Natural Yes
Metal Yes
Nonmetal No
Metalloid No
Type Transition Metal
Atomic Radius 145 pm
Electronegativity 1.90 (Pauling scale)
First Ionization Energy 7.726 eV
Density 8.96 g/cm³
Melting Point 1084.62 °C
Boiling Point 2562 °C
Number of Isotopes 2 stable (Copper-63, Copper-65)
Discoverer Known since ancient times
Year Unknown
Specific Heat 0.385 J/g·K
Number of Shells 4
Number of Valence Electrons 11
Tags: Tutorials Chemistry tutorial step by step learn how to guide examples
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