Iron

Iron, ₂₆Fe

Iron
Ìhànsójú	lustrous metallic with a grayish tinge
Ìwúwo átọ̀mù Ar, std(Fe)	55.845(2)[1]
Iron ní orí tábìlì àyè
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Nọ́mbà átọ̀mù (Z)	26
Ẹgbẹ́	group 8
Àyè	àyè 4
Àdìpọ̀	Àdìpọ̀-d
Ẹ̀ka ẹ́límẹ́ntì	Transition metal
Ìtò ẹ̀lẹ́ktrọ́nù	[Ar] 3d6 4s2
Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan	2, 8, 14, 2
Àwọn ohun ìní ara
Ìfarahàn at STP	solid
Ìgbà ìyọ́	1811 K ​(1538 °C, ​2800 °F)
Ígbà ìhó	3134 K ​(2862 °C, ​5182 °F)
Kíki (near r.t.)	7.874 g/cm3
when liquid (at m.p.)	6.98 g/cm3
Heat of fusion	13.81 kJ/mol
Heat of	340 kJ/mol
Molar heat capacity	25.10 J/(mol·K)
pressure P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 1728 1890 2091 2346 2679 3132
Atomic properties
Oxidation states	−4, −2, −1, 0, +1,[2] +2, +3, +4, +5,[3] +6, +7[4] Àdàkọ:Infobox element/symbol-to-oxidation-state/comment
Electronegativity	Pauling scale: 1.83
energies	(more)
Atomic radius	empirical: 126 pm
Covalent radius	132±3 (low spin), 152±6 (high spin) pm
Color lines in a spectral range Spectral lines of iron
Other properties
Natural occurrence	primordial
Crystal structure	​(bcc)
Speed of sound thin rod	(electrolytic) 5120 m/s (at r.t.)
Thermal expansion	11.8 µm/(m·K) (at 25 °C)
Thermal conductivity	80.4 W/(m·K)
Electrical resistivity	96.1 n Ω·m (at 20 °C)
Magnetic ordering	ferromagnetic
Young's modulus	211 GPa
Shear modulus	82 GPa
Bulk modulus	170 GPa
Poisson ratio	0.29
Mohs hardness	4
Vickers hardness	608 MPa
Brinell hardness	490 MPa
CAS Number	7439-89-6
Main isotopes of iron
Iso­tope Abun­dance Half-life (t1/2) Decay mode Pro­duct 54Fe 5.8% >3.1×1022y 2ε capture ? 54Cr 55Fe syn 2.73 y ε capture 0.231 55Mn 56Fe 91.72% 56Fe is stable with 30 neutrons 57Fe 2.2% 57Fe is stable with 31 neutrons 58Fe 0.28% 58Fe is stable with 32 neutrons 59Fe syn 44.503 d β− 1.565 59Co 60Fe syn 2.6×106 y β− 3.978 60Co
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