Ang vanadyo (Iningles vanadium ) mao ang elementong kimiko sa talaang peryodiko nga may simbolo nga V ug kaiphan nga atomik 23. Ang vanadyo mao ang puthaw nga transisyon .
Quick Facts Vanadium, Panagway ...
Vanadium
23
Panagway
blue-silver-grey metal
Kinatibuk-ang mga kinaiya
Ngalan, simbolo , kaiphan
vanadium, V, 23
Paglitok
[[Help:Pronunciation respelling key|və-Plantilya:Smallcaps all ]]
Kategoriyang elemento puthaw nga transisyon
Group , period , block 5 , 4 , d
Gibug-aton sa atomo 50.9415(1)
Kontorno sa elektron [ Ar ] 3d3 4s2 Electron shells of vanadium (2, 8, 11, 2)
History
Pagkadiskobre Andrés Manuel del Río (1801)
First isolation
Nils Gabriel Sefström (1830)
Named by
Nils Gabriel Sefström (1830)
Physical properties
Phase magahi
Density (near r.t. )6.0 g·cm−3
Liquid density at m.p.
5.5 g·cm−3
Melting point 2183 K , 1910 °C, 3470 °F
Boiling point 3680 K, 3407 °C, 6165 °F
Heat of fusion 21.5 kJ·mol−1
Heat of vaporization 459 kJ·mol−1
Molar heat capacity 24.89 J·mol−1 ·K−1
Vapor pressure
P (Pa)
1
10
100
1 k
10 k
100 k
at T (K)
2101
2289
2523
2814
3187
3679
Atomic properties
Oxidation states 5 , 4, 3, 2, 1, -1amphoteric oxide)
Electronegativity 1.63 (Pauling scale)
Ionization energies more )1st: 650.9 kJ·mol−1
2nd: 1414 kJ·mol−1
3rd: 2830 kJ·mol−1
Atomic radius 134 pm
Covalent radius 153±8 pm
Miscellanea
Crystal structure body-centered cubic
Magnetic ordering paramagnetic
Electrical resistivity (20 °C) 197 nΩ·m
Thermal conductivity 30.7 W·m−1 ·K−1
Thermal expansion (25 °C) 8.4 µm·m−1 ·K−1
Speed of sound (thin rod)(20 °C) 4560 m·s−1
Young's modulus 128 GPa
Shear modulus 47 GPa
Bulk modulus 160 GPa
Poisson ratio 0.37
Mohs hardness 6.7
CAS registry number 7440-62-2
Most stable isotopes
Main article: Isotopes of vanadium
iso NA half-life DM DE (MeV ) DP
48 Vsyn 15.9735 d β+ 4.0123
48 Ti
49 Vsyn 330 d ε 0.6019
49 Ti
50 V0.25%
1.5× 1017 y
ε 2.2083
50 Ti
β− 1.0369
50 Cr
51 V99.75%
51 V is stable with 28 neutrons
· r
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