Bàbà

Copper, ₂₉Cu

Copper
Ìhànsójú	reddish/orange metallic luster
Ìwúwo átọ̀mù Ar, std(Cu)	63.546(3)
Copper ní orí tábìlì àyè
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Nọ́mbà átọ̀mù (Z)	29
Ẹgbẹ́	group 11
Àyè	àyè 4
Àdìpọ̀	Àdìpọ̀-d
Ẹ̀ka ẹ́límẹ́ntì	Transition metal
Ìtò ẹ̀lẹ́ktrọ́nù	[Ar] 3d10 4s1
Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan	2, 8, 18, 1
Àwọn ohun ìní ara
Ìfarahàn at STP	solid
Ìgbà ìyọ́	1357.77 K ​(1084.62 °C, ​1984.32 °F)
Ígbà ìhó	2835 K ​(2562 °C, ​4643 °F)
Kíki (near r.t.)	8.94 g/cm3
when liquid (at m.p.)	8.02 g/cm3
Heat of fusion	13.26 kJ/mol
Heat of	300.4 kJ/mol
Molar heat capacity	24.440 J/(mol·K)
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, +1, +2, +3, +4 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment
Electronegativity	Pauling scale: 1.90
energies	(more)
Atomic radius	empirical: 128 pm
Covalent radius	132±4 pm
Van der Waals radius	140 pm
Color lines in a spectral range Spectral lines of copper
Other properties
Natural occurrence	primordial
Crystal structure	​(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 n Ω·m (at 20 °C)
Magnetic ordering	diamagnetic
Young's modulus	110–128 GPa
Shear modulus	48 GPa
Bulk modulus	140 GPa
Poisson ratio	0.34
Mohs hardness	3.0
Vickers hardness	369 MPa
Brinell hardness	874 MPa
CAS Number	7440-50-8
Main isotopes of copper
Iso­tope Abun­dance Half-life (t1/2) Decay mode Pro­duct 63Cu 69.15% 63Cu is stable with 34 neutrons 65Cu 30.85% 65Cu is stable with 36 neutrons