Atomic number: 29

Symbol: Cu

Category: transition metal

Density at 25°C: solid:  8.96 g·cm−3

Copper is an element known even to the ancients. It is relatively easy to purify and presents with a shiny orange appearance. It is also a critical trace element required in almost all life. But mostly it is valued in bulk for it's building and conducting properties.

99.95% pure copper disc created using continuous casting. image adapted from wikipedia

Use, natural applications or common combinations: 

  • Wires, 
  • Life essential as part of enzyme complex cytochrome c oxidase.
  • Building, pots pans

Basic characteristics:

  • Standard atomic weight: 63.546(3)
  • Melting point: 1084.62 °C
  • Boiling point: 2562 °C
  • Radioactivity:  almost all stable naturally