Iron

Iron, ₂₆Fe
Iron
Ìhànsójú	lustrous metallic with a grayish tinge
Ìwúwo átọ̀mù Ar, std(Fe)	55.845(2)
Iron ní orí tábìlì àyè
	manganese ← iron → cobalt
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)
Atomic properties
Oxidation states	−4, −2, −1, 0, +1, +2, +3, +4, +5, +6, +7 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 rangeSpectral 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
	Àdàkọ:Category-inline; wo; ọ̀rọ̀; àtúnṣe; \| references

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Itokasi

↑ 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.
↑ Ram, R. S. & Bernath, P. F. (2003). "Fourier transform emission spectroscopy of the g⁴Δ-a⁴Δ system of FeCl". Journal of Molecular Spectroscopy 221 (2): 261. Bibcode 2003JMoSp.221..261R. doi:10.1016/S0022-2852(03)00225-X. http://bernath.uwaterloo.ca/media/266.pdf.
↑ Demazeau, G.; Buffat, B.; Pouchard, M.; Hagenmuller, P. (1982). "Recent developments in the field of high oxidation states of transition elements in oxides stabilization of Six-coordinated Iron(V)". Zeitschrift für anorganische und allgemeine Chemie 491: 60–66. doi:10.1002/zaac.19824910109.
↑ Lu, J.; Jian, J.; Huang, W.; Lin, H.; Li, J; Zhou, M. (2016). "Experimental and theoretical identification of the Fe(VII) oxidation state in FeO4−". Physical Chemistry Chemical Physics 18 (45): 31125–31131. Bibcode 2016PCCP...1831125L. doi:10.1039/C6CP06753K. PMID 27812577.