29 · Cu

Copper

Known since antiquity, with no discovery year.

Identity

Atomic number: 29
Symbol: Cu
Canonical name: Copper
Category: transition metal
Group: 11
Period: 4
Block: d
Other names: cuprum

Properties

These quantities come from the Periodic Table JSON compilation. They have not yet been checked, one by one, against CIAAW atomic weights or NIST measurements. A value marked estimated is not a measurement.

Atomic mass: 63.5463 u
Electron configuration: [Ar] 3d10 4s1
Electrons per shell: 2, 8, 18, 1
Standard state: solid
Density: 8.96 g/cm³
Melting point: 1,357.77 K
Boiling point: 2,835 K
Electronegativity: 1.9 Pauling
First ionization energy: 745.5 kJ/mol
Electron affinity: 119.235 kJ/mol

History

Antiquity

Copper was worked in antiquity. No discovery year can be assigned.

See the element timeline

Etymology

Theme: place
Language: latin
Root: cuprum
Meaning: Cyprus

Sources

IUPAC, Periodic Table of the Elements
Bowserinator, Periodic Table JSON. Compilation secondaire d’où viennent les grandeurs physiques importées (masse, densité, températures, énergies). Elles ne sont pas revérifiées une à une auprès du NIST ou de la CIAAW.