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Copper (Cu)

From Wikipedia, the free encyclopediaCopper is a chemical element with symbol Cu (from Latin:cuprum) and atomic number 29. It is a soft, malleable and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a reddish-orange color.

Copper in the periodic table

SymbolCu
Atomic number29
Group11
Period4
Blockd
Element categoryTransition Metal

Physical properties

Phase at STPSolid
Density8.96 g/cm3
Atomic weight63.5463 u
Melting point1357.77 K
1084.62 °C
1984.316 °F
Boiling point2835 K
2561.85 °C
4643.33 °F

Atomic properties

Electronegativity (Pauling Scale)1.9
Electron affinity119.235 kJ/mol
Oxidation states−2, 0, +1, +2, +3, +4
(a mildly basic oxide)
Ionization energies
1745.5 kJ/mol
2 1957.9 kJ/mol
3 3555 kJ/mol
4 5536 kJ/mol
5 7700 kJ/mol
6 9900 kJ/mol
7 13400 kJ/mol
8 16000 kJ/mol
9 19200 kJ/mol
10 22400 kJ/mol
11 25600 kJ/mol
12 35600 kJ/mol
13 38700 kJ/mol
14 42000 kJ/mol
15 46700 kJ/mol
16 50200 kJ/mol
17 53700 kJ/mol
18 61100 kJ/mol
19 64702 kJ/mol
20 163700 kJ/mol
21 174100 kJ/mol
22 184900 kJ/mol
23 198800 kJ/mol
24 210500 kJ/mol
25 222700 kJ/mol
26 239100 kJ/mol
27 249660 kJ/mol
28 1067358 kJ/mol
29 1116105 kJ/mol

Electron configuration

Elektronkonfiguration (shorthand)[Ar] 3d10 4s1
Electron configuration1s2 2s2 2p6 3s2 3p6 3d10 4s1
Electrons per shell2, 8, 18, 1

History

Discovered-9000
Discovered byMiddle East
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