General: |
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Name: Iron
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Symbol: Fe
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Group: Trans. Met.
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Atomic weight: 55.847
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Density @ 293 K: 7.86 g/cm3
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Atomic volume: 7.1 cm3/mol
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Group: Trans. Met.
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discovered: 0
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States: |
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state (s, l, g): s
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melting point: 1808.2 K
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boiling point: 3023 K
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Heat of fusion: 13.80 kJ/mol
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Heat of vaporization: 349.60 kJ/mol
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Energies: |
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1st ionization energy: 759.3 kJ/mole
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electronegativity: 1.9
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2nd ionization energy: 1561.1 kJ/mole
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electron affinity: 15.7 kJ/mole
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3rd ionization energy: 2957.3 kJ/mole
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Specific heat: 0.44 J/gK
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heat atomization: 418 kJ/mole atoms
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Oxidation & Electrons: |
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Shells: 2,8,14,2
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electron configuration: [Ar] 3d6 4s2
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minimum oxidation number: -2
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maximum oxidation number: 6
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min. common oxidation no.: 0
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max. common oxidation no.: 3
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Appearance & Characteristics: |
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structure: bcc: body-centered cubic
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color: gray
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uses: steel
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toxicity:
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hardness: 4.5 mohs
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characteristics: fairly soft when pure
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Reactions: |
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reaction with air: mild, =>Fe3O4
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reaction with 6M HCl: mild, =>H2, FeCl2
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reaction with 6M HCl: mild, =>H2, FeCl2
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reaction with 15M HNO3: passivated
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reaction with 6M NaOH:
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Other Forms: |
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number of isotopes: 4
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hydride(s): none
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oxide(s): FeO Fe3O4 Fe2O3
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chloride(s): FeCl2 FeCl3
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Radius: |
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ionic radius (2- ion): pm
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ionic radius (1- ion): pm
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atomic radius: 126 pm
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ionic radius (1+ ion): pm
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ionic radius (2+ ion): 83.5 pm
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ionic radius (3+ ion): 73.8 pm
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Conductivity: |
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thermal conductivity: 72.8 J/m-sec-deg
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electrical conductivity: 102.987 1/mohm-cm
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polarizability: 8.4 A^3
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Abundance: |
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source: Hematite,magnetite(oxide)
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rel. abund. solar system: 5.954 log
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abundance earth's crust: 4.8 log
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cost, pure: 6.7 $/100g
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cost, bulk: 0.021 $/100g
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