General | States | Energies | Oxidation & Electrons |Appearance & Characteristics
Reactions | Other Forms |Radius | Conductivity | Abundance
Encyclopedia Britannica articles


Name Rhenium Symbol Re
atomic number 75 Atomic weight 186.207
Density @ 293 K 21.0 g/cm3 Atomic volume 8.85 cm3/mol
Group Trans. Met. discovered 1925


state (s, l, g) s
melting point 3453.2 K boiling point 5923 K
Heat of fusion 33.20 kJ/mol Heat of vaporization 715.0 kJ/mol
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1st ionization energy 760 kJ/mole electronegativity 1.9
2nd ionization energy kJ/mole electron affinity 14 kJ/mole
3rd ionization energy kJ/mole Specific heat 0.13 J/gK
heat atomization 770 kJ/mole atoms

Oxidation & Electrons

Shells 2,8,18,32,13,2 electron configuration [Xe] 4f14 5d5 6s2
minimum oxidation number -3 maximum oxidation number 7
min. common oxidation no. 0 max. common oxidation no. 4
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Appearance & Characteristics

structure hcp: hexagonal close pkd color silvery-white
uses catalysts, thermocouples toxicity
hardness mohs characteristics high melting point


reaction with air mild, w/ht = Re2O7 reaction with 6M HCl none
reaction with 6M HCl none reaction with 15M HNO3 mild, = HReO4
reaction with 6M NaOH
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Other Forms

number of isotopes 2 hydride(s) none
oxide(s) Re2O5 ReO3 Re2O7 chloride(s) Re3Cl9 ReCl4 ReCl5 ReCl6


ionic radius (2- ion) pm ionic radius (1- ion) pm
atomic radius 137 pm ionic radius (1+ ion) pm
ionic radius (2+ ion) pm ionic radius (3+ ion) pm
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thermal conductivity 48 J/m-sec-deg electrical conductivity 51.813 1/mohm-cm
polarizability 9.7 A^3


source Molybdenite (sulfide) rel. abund. solar system -1.287 log
abundance earth's crust -2.3 log cost, pure 540 $/100g
cost, bulk $/100g
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World Wide Web presentation of Chemicool Periodic Table is © Copyright 1996-99 by David D. Hsu. Some data were provided by and used with the permission of JCE Software and is owned and copyright by the Division of Chemical Education, Inc. Additional data were provided by Perkin-Elmer through Peter Lykos of IIT. The information may not be redistributed without the permission of David Hsu or JCE Software.