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Reni - Wikipèdia

Reni

Un article de Wikipèdia, l'enciclopèdia liura.

75 tungstènreniòsmi
Tc

Re

Bh
Taula periodica
Generalitats
Nom, Simbòl, Numero reni, Re, 75
Tièra quimica metals de transicion
Grop, Periòde, Blòc 7, 6, d
Aparéncia blanc grisenc
Massa atomica 186.207(1) g/mol
Configuracion electronica [Xe] 4f14 5d5 6s2
Electrons per nivèl energetic 2, 8, 18, 32, 13, 2
Proprietats fisicas
Fasa solid
Densitat (temperatura ambienta) 21.02 g/cm³
Densitat liquida al punt de fusion 18.9 g/cm³
Punt de fusion 3459 K
(3186 °C, 5767 °F)
Punt d'ebullicion 5869 K
(5596 °C, 10105 °F)
Calor de fusion 60.43 kJ/mol
Calor de vaporizacion 704 kJ/mol
Capacitat calorifica (25 °C) 25.48 J/(mol·K)
Pression de vapor
P/Pa 1 10 100 1 k 10 k 100 k
a T/K 3303 3614 4009 4500 5127 5954
Proprietats atomicas
Estructura cristallina exagonal
Estat d'oxidacion 6, 4, 2, −2
(oxid leugièrament acid)
Electronegativitat 1.9 (Escala de Pauling)
Potencials d'ionizacion
(mai)
1èr : 760 kJ/mol
2nd : 1260 kJ/mol
3en : 2510 kJ/mol
Rai atomic 135 pm
Rai atomic calculat 188 pm
Rai covalent 159 pm
Informacions divèrsas
Magnetisme pas de donada
Resistivitat electrica (20 °C) 193 nΩ·m
Conductivitat termica (300 K) 48.0 W/(m·K)
Dilatacion termica (25 °C) 6.2 µm/(m·K)
Velocitat del son (20 °C) 4700 m/s
Modul de Young 463 GPa
Shear modulus 178 GPa
Modul de Bulk 370 GPa
Coeficient de Poisson 0.30
Duretat de Mohs 7.0
Vickers hardness 2450 MPa
Duretat de Brinell 1320 MPa
Numèro CAS 7440-15-5
Isotòps mai estables
Article : Isotòps del (de l') reni
iso NA Mièja vida MD ED (MeV) PD
185Re 37.4% Re es estable amb 110 neutrons
187Re 62.6% 4.35 E10 y α 1.653 183Ta
β 0.003 187Os
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