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Ittri - Wikipèdia

Ittri

Un article de Wikipèdia, l'enciclopèdia liura.

39 estronciittrizircòni
Sc

Y

Lu
Taula periodica
Generalitats
Nom, Simbòl, Numero ittri, Y, 39
Tièra quimica metals de transicion
Grop, Periòde, Blòc 3, 5, d
Aparéncia blanc argentat
Massa atomica 88.90585(2) g/mol
Configuracion electronica [Kr] 4d1 5s2
Electrons per nivèl energetic 2, 8, 18, 9, 2
Proprietats fisicas
Fasa solid
Densitat (temperatura ambienta) 4.472 g/cm³
Densitat liquida al punt de fusion 4.24 g/cm³
Punt de fusion 1799 K
(1526 °C, 2779 °F)
Punt d'ebullicion 3609 K
(3336 °C, 6037 °F)
Calor de fusion 11.42 kJ/mol
Calor de vaporizacion 365 kJ/mol
Capacitat calorifica (25 °C) 26.53 J/(mol·K)
Pression de vapor
P/Pa 1 10 100 1 k 10 k 100 k
a T/K 1883 2075 (2320) (2627) (3036) (3607)
Proprietats atomicas
Estructura cristallina exagonal
Estat d'oxidacion 3
(weakly basic oxide)
Electronegativitat 1.22 (Escala de Pauling)
Potencials d'ionizacion
(mai)
1èr : 600 kJ/mol
2nd : 1180 kJ/mol
3en : 1980 kJ/mol
Rai atomic 180 pm
Rai atomic calculat 212 pm
Rai covalent 162 pm
Informacions divèrsas
Magnetisme pas de donada

Modèl:Elementbox eresist ohmm

Conductivitat termica (300 K) 17.2 W/(m·K)

Modèl:Elementbox thermalexpansion umpmk

Velocitat del son (20 °C) 3300 m/s
Modul de Young 63.5 GPa
Shear modulus 25.6 GPa
Modul de Bulk 41.2 GPa
Coeficient de Poisson 0.243
Duretat de Brinell 589 MPa
Numèro CAS 7440-65-5
Isotòps mai estables
Article : Isotòps del (de l') ittri
iso NA Mièja vida MD ED (MeV) PD
87Y syn 3.35 d ε - 87Sr
γ 0.48, 0.38D -
88Y syn 106.6 d ε - 88Sr
γ 1.83, 0.89 -
89Y 100% Y es estable amb 50 neutrons
90Y syn 2.67 d β- 2.28 90Zr
γ 2.18 -
91Y syn 58.5 d β- 1.54 91Zr
γ 1.20 -
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