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Vanadium - Wikipedia

Vanadium

vanuit Wikipedia, die vrye ensiklopedie.

23 titaanvanadiumchroom
-

V

Nb
Algemeen
Naam, Simbool, Getal vanadium, V, 23
Chemiese reeks oorgangsmetaal
Groep, Periode, Blok 5, 4, d
Voorkoms silwergrys metaalkleur
Atoommassa 50.9415 g/mol
Elektronkonfigurasie [Ar] 3d3 4s2
Elektrone per skil 2, 8, 11, 2
Fisiese Eienskappe
Toestand vastestof
Digtheid (naby k.t.) 6.0 g/cm³
Vloeistof digtheid teen s.p. 5.5 g/cm³
Smeltpunt 2183 K
(1910 °C)
Kookpunt 3680 K
(3407 °C)
Smeltingswarmte 21.5 kJ/mol
Verdampingswarmte 459 kJ/mol
Warmtekapasiteit (25 °C) 24.89 J/(mol·K)
Dampdruk
P/Pa 1 10 100 1 k 10 k 100 k
teen T/K 2101 2289 2523 2814 3187 3679
Atoomeienskappe
Kristalstruktuur kubies-vlakgesentreerd
Oksidasietoestande 5, 3
(amfoteriese oksied)
Elektronegatiwiteit 1.63 (Skaal van Pauling)
Ionisasie energieë
(meer)
1ste: 650.9 kJ/mol
2de: 1414 kJ/mol
3rde: 2830 kJ/mol
Atoomradius 135 pm
Atoomradius (ber.) 171 pm
Kovalente radius 125 pm
Diverse
Magnetiese rangskikking  ???
Elektriese weerstand (20 °C) 197 nΩ·m
Termiese geleidingsvermoë (300 K) 30.7 W/(m·K)
Termiese uitsetting (25 °C) 8.4 µm/(m·K)
Spoed van klank (dun staaf) (20 °C) 4560 m/s
Young se modulus 128 GPa
Skuifmodulus 47 GPa
Massamodulus 160 GPa
Poissonverhouding 0.37
Mohs se hardheid 7.0
Vickers hardheid 628 MPa
Brinell hardheid 628 MPa
CAS-registernommer 7440-62-2
Vernaamste isotope
Hoofartikel: Isotope van vanadium
iso NV halfleeftyd VM VE (MeV) VP
48V sin 15.97 d ε - 48Ti
β+ 0.694 48Ti
γ 0.98, 1.3 -
49V sin 330 d ε - 49Ti
50V 0.25% 1.4E17 j ε - 50Ti
β- 1.037 50Cr
γ 0.78, 1.55 -
51V 99.75% V is stabiel met 28 neutrone
Verwysings

Vanadium is 'n chemiese element in die periodieke tabel met die simbool V en atoomgetal 23. Vanadium is 'n skaars, sagte en smeebare element en word in verbinding in sekere minerale aangetref en word hoofsaaklik gebruik in die vervaardiging van sekere soorte legerings.

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