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Iron |
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Ìhànsójú | lustrous metallic with a grayish tinge |
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Ìwúwo átọ̀mù Ar, std(Fe) | 55.845(2)[1] |
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Iron ní orí tábìlì àyè |
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Nọ́mbà átọ̀mù (Z) | 26 |
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Ẹgbẹ́ | group 8 |
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Àyè | àyè 4 |
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Àdìpọ̀ | Àdìpọ̀-d |
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Ẹ̀ka ẹ́límẹ́ntì | Transition metal |
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Ìtò ẹ̀lẹ́ktrọ́nù | [Ar] 3d6 4s2 |
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Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan | 2, 8, 14, 2 |
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Àwọn ohun ìní ara |
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Ìfarahàn at STP | solid |
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Ìgbà ìyọ́ | 1811 K (1538 °C, 2800 °F) |
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Ígbà ìhó | 3134 K (2862 °C, 5182 °F) |
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Kíki (near r.t.) | 7.874 g/cm3 |
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when liquid (at m.p.) | 6.98 g/cm3 |
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Heat of fusion | 13.81 kJ/mol |
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Heat of | 340 kJ/mol |
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Molar heat capacity | 25.10 J/(mol·K) |
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pressure
P (Pa)
|
1
|
10
|
100
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1 k
|
10 k
|
100 k
|
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at T (K)
|
1728
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1890
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2091
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2346
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2679
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3132
|
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Atomic properties |
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Oxidation states | −4, −2, −1, 0, +1,[2] +2, +3, +4, +5,[3] +6, +7[4] Àdàkọ:Infobox element/symbol-to-oxidation-state/comment |
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Electronegativity | Pauling scale: 1.83 |
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energies | |
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Atomic radius | empirical: 126 pm |
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Covalent radius | 132±3 (low spin), 152±6 (high spin) pm |
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Spectral lines of iron |
Other properties |
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Natural occurrence | primordial |
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Crystal structure | (bcc) |
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Speed of sound thin rod | (electrolytic) 5120 m/s (at r.t.) |
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Thermal expansion | 11.8 µm/(m·K) (at 25 °C) |
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Thermal conductivity | 80.4 W/(m·K) |
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Electrical resistivity | 96.1 n Ω·m (at 20 °C) |
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Magnetic ordering | ferromagnetic |
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Young's modulus | 211 GPa |
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Shear modulus | 82 GPa |
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Bulk modulus | 170 GPa |
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Poisson ratio | 0.29 |
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Mohs hardness | 4 |
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Vickers hardness | 608 MPa |
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Brinell hardness | 490 MPa |
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CAS Number | 7439-89-6 |
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Main isotopes of iron |
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Àdàkọ:Category-inline | references |