Copper, 29 Cu Copper Appearance red-orange metallic luster Standard atomic weight A r, std (Cu) 63.546(3)[1] Copper in the periodic table
Atomic number (Z ) 29 Group group 11 Period period 4 Block d-block Element category d-block Electron configuration [Ar ] 3d10 4s1 Electrons per shell 2, 8, 18, 1 Physical properties Phase at STP solid Melting point 1357.77 K (1084.62 °C, 1984.32 °F) Boiling point 2835 K (2562 °C, 4643 °F) Density (near r.t. ) 8.96 g/cm3 when liquid (at m.p. ) 8.02 g/cm3 Heat of fusion 13.26 kJ/mol Heat of vaporization 300.4 kJ/mol Molar heat capacity 24.440 J/(mol·K) Vapor pressure
P (Pa)
1
10
100
1 k
10 k
100 k
at T (K)
1509
1661
1850
2089
2404
2834
Atomic properties Oxidation states −2, 0,[2] +1 , +2 , +3, +4 (a mildly basic oxide) Electronegativity Pauling scale: 1.90 Ionization energies 1st: 745.5 kJ/mol 2nd: 1957.9 kJ/mol 3rd: 3555 kJ/mol (more ) Atomic radius empirical: 128 pm Covalent radius 132±4 pm Van der Waals radius 140 pm Spectral lines of copperOther properties Natural occurrence primordial Crystal structure face-centered cubic (fcc) Speed of sound thin rod (annealed) 3810 m/s (at r.t. ) Thermal expansion 16.5 µm/(m·K) (at 25 °C) Thermal conductivity 401 W/(m·K) Electrical resistivity 16.78 nΩ·m (at 20 °C) Magnetic ordering diamagnetic [3] Magnetic susceptibility −5.46·10−6 cm3 /mol[4] Young's modulus 110–128 GPa Shear modulus 48 GPa Bulk modulus 140 GPa Poisson ratio 0.34 Mohs hardness 3.0 Vickers hardness 343–369 MPa Brinell hardness 235–878 MPa CAS Number 7440-50-8 History Naming after Cyprus , principal mining place in Roman era (Cyprium ) Discovery Middle East (9000 BC ) Main isotopes of copper
Category: Copper view · talk · edit
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Cu
data m.p. cat
in
calc from C
diff
report
ref
C
1084.62
—
—
K
1357.77
1357.77
0
F
1984.32
1984.32
0
max precision
2
WD
input
C: 1084.62, K: 1357.77, F: 1984.32
comment
Cu
data b.p. cat
in
calc from C
diff
report
ref
C
2562
—
—
K
2835
2835
0
F
4643
4644
-1
delta
max precision
0
WD
input
C: 2562, K: 2835, F: 4643
comment
References
These references will appear in the article, but this list appears only on this page.
↑ Meija, Juris; Coplen, Tyler B.; Berglund, Michael; Brand, Willi A.; De Bièvre, Paul; Gröning, Manfred; Holden, Norman E.; Irrgeher, Johanna et al . (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure and Applied Chemistry 88 (3): 265–91. doi :10.1515/pac-2015-0305 .
↑ Moret, Marc-Etienne; Zhang, Limei; Peters, Jonas C. (2013). "A Polar Copper–Boron One-Electron σ-Bond". J. Am. Chem. Soc 135 (10): 3792–3795. doi :10.1021/ja4006578 . PMID 23418750 .
↑ Lide, D. R., ed (2005). "Magnetic susceptibility of the elements and inorganic compounds" . CRC Handbook of Chemistry and Physics (86th ed.). Boca Raton (FL): CRC Press. ISBN 0-8493-0486-5 . https://web.archive.org/web/20110303222309/http://www-d0.fnal.gov/hardware/cal/lvps_info/engineering/elementmagn.pdf .
↑ Weast, Robert (1984). CRC, Handbook of Chemistry and Physics . Boca Raton, Florida: Chemical Rubber Company Publishing. pp. E110. ISBN 0-8493-0464-4 .
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