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6 bòrcarbòniazòt
-

C

Si
Generalitats
Nom, Simbòl, Numero carbòni, C, 6
Tièra quimica nonmetals
Grop, Periòde, Blòc 14, 2, p
Aparéncia negre (grafit)
incolòr (diamant)
Massa atomica 12.0107(8) g/mol
Configuracion electronica 1s2 2s2 2p2
Electrons per nivèl energetic 2, 4
Proprietats fisicas
Fasa solid
Densitat (temperatura ambienta) (grafit) 2.267 g/cm³
Densitat (temperatura ambienta) (diamant) 3.513 g/cm³
Punt de fusion ? 4300-4700 K
(? °C, ? °F)
Punt d'ebullicion subl. ? ca. 4000 K
(? °C, ? °F)
Calor de fusion (grafit) ? 100 kJ/mol
Calor de fusion (diamant) ? 120 kJ/mol
Calor de vaporizacion ? 355.8 kJ/mol
Capacitat calorifica (25 °C) (grafit)
8.517 J/(mol·K)
Capacitat calorifica (25 °C) (diamant)
6.115 J/(mol·K)
Pression de vapor (grafit)
P/Pa 1 10 100 1 k 10 k 100 k
a T/K 2839 3048 3289 3572 3908
Proprietats atomicas
Estructura cristallina exagonala
Estat d'oxidacion 4, 2
(oxid leugièrament acid)
Electronegativitat 2.55 (Escala de Pauling)
Potencials d'ionizacion
(mai)
1èr : 1086.5 kJ/mol
2nd : 2352.6 kJ/mol
3en : 4620.5 kJ/mol
Rai atomic 70 pm
Rai atomic calculat 67 pm
Rai covalent 77 pm
Rai de Van der Waals 170 pm
Informacions divèrsas
Magnetisme diamagnetic
Conductivitat termica (300 K) (grafit)
(119–165) W/(m·K)
Conductivitat termica (300 K) (diamant)
(900–2320) W/(m·K)
Duretat de Mohs (grafit) 0.5
Duretat de Mohs (diamant) 10.0
Numèro CAS 7440-44-0
Isotòps mai estables
Article : Isotòps del (de l') carbòni
iso NA Mièja vida MD ED (MeV) PD
12C 98.9% C es estable amb 6 neutrons
13C 1.1% C es estable amb 7 neutrons
14C trace 5730 y beta- 0.156 14N
Reférencias


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