Periodex

General properties

Group

group 11

Period

period 4

Category

transition metals

Standard atomic weight

63.546(3)

Melting point

1357.77 K (1084.62 °C)

Boiling point

2835 K (2562 °C)

Phase at STP

solid

Additional properties

Block

d-block

Electron configuration

[Ar] 3d¹⁰ 4s¹

Electrons per shell

2, 8, 18, 1

Electronegativity

1.90

Density

8.96 g/cm³

Oxidation states

−2, 0, +1, +2, +3, +4

CAS Number

7440-50-8

Natural isotopes

Discovery history

Discovered by

ancient civilizations

Year of discovery

9000 BCE

Origin of name

The Old English name coper in turn derived from the Latin 'Cyprium aes', meaning a metal from Cyprus