General: |
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Name: Rhenium
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Symbol: Re
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Group: Trans. Met.
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Atomic weight: 186.207
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Density @ 293 K: 21.0 g/cm3
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Atomic volume: 8.85 cm3/mol
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Group: Trans. Met.
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discovered: 1925
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States: |
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state (s, l, g): s
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melting point: 3453.2 K
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boiling point: 5923 K
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Heat of fusion: 33.20 kJ/mol
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Heat of vaporization: 715.0 kJ/mol
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Energies: |
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1st ionization energy: 760 kJ/mole
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electronegativity: 1.9
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2nd ionization energy: kJ/mole
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electron affinity: 14 kJ/mole
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3rd ionization energy: kJ/mole
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Specific heat: 0.13 J/gK
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heat atomization: 770 kJ/mole atoms
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Oxidation & Electrons: |
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Shells: 2,8,18,32,13,2
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electron configuration: [Xe] 4f14 5d5 6s2
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minimum oxidation number: -3
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maximum oxidation number: 7
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min. common oxidation no.: 0
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max. common oxidation no.: 4
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Appearance & Characteristics: |
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structure: hcp: hexagonal close pkd
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color: silvery-white
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uses: catalysts, thermocouples
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toxicity:
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hardness: mohs
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characteristics: high melting point
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Reactions: |
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reaction with air: mild, w/ht =>Re2O7
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reaction with 6M HCl: none
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reaction with 6M HCl: none
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reaction with 15M HNO3: mild, =>HReO4
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reaction with 6M NaOH:
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Other Forms: |
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number of isotopes: 2
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hydride(s): none
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oxide(s): Re2O5 ReO3 Re2O7
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chloride(s): Re3Cl9 ReCl4 ReCl5 ReCl6
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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: 137 pm
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ionic radius (1+ ion): pm
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ionic radius (2+ ion): pm
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ionic radius (3+ ion): pm
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Conductivity: |
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thermal conductivity: 48 J/m-sec-deg
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electrical conductivity: 51.813 1/mohm-cm
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polarizability: 9.7 A^3
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Abundance: |
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source: Molybdenite (sulfide)
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rel. abund. solar system: -1.287 log
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abundance earth's crust: -2.3 log
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cost, pure: 540 $/100g
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cost, bulk: $/100g
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