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Titanium, 22 Ti File:Titan-crystal bar.JPG Pronunciation Appearance silvery grey-white metallic 47.867(1)[ 2]
Atomic number (Z ) 22 Group group 4 Period period 4 Block d-block Electron configuration [Ar ] 3d2 4s2 Electrons per shell 2, 8, 10, 2 Phase at STP solid Melting point 1941 K (1668 °C, 3034 °F) Boiling point 3560 K (3287 °C, 5949 °F) Density (near r.t. ) 4.506 g/cm3 when liquid (at m.p. ) 4.11 g/cm3 Heat of fusion 14.15 kJ/mol Heat of vaporization 425 kJ/mol Molar heat capacity 25.060 J/(mol·K) Vapor pressure
P (Pa)
1
10
100
1 k
10 k
100 k
at T (K)
1982
2171
(2403)
2692
3064
3558
Oxidation states −2, −1, 0,[ 3] +1, +2 , +3 , +4 [ 4] (an amphoteric oxide) Electronegativity Pauling scale: 1.54 Ionization energies 1st: 658.8 kJ/mol 2nd: 1309.8 kJ/mol 3rd: 2652.5 kJ/mol (more ) Atomic radius empirical: 147 pm Covalent radius 160±8 pm Color lines in a spectral range Spectral lines of titaniumNatural occurrence primordial Crystal structure hexagonal close-packed (hcp) Speed of sound thin rod 5090 m/s (at r.t. ) Thermal expansion 8.6 µm/(m⋅K) (at 25 °C) Thermal conductivity 21.9 W/(m⋅K) Electrical resistivity 420 nΩ⋅m (at 20 °C) Magnetic ordering paramagnetic Molar magnetic susceptibility +153.0× 10−6 cm3 /mol (293 K)[ 5] Young's modulus 116 GPa Shear modulus 44 GPa Bulk modulus 110 GPa Poisson ratio 0.32 Mohs hardness 6.0 Vickers hardness 830–3420 MPa Brinell hardness 716–2770 MPa CAS Number 7440-32-6 Discovery William Gregor (1791) First isolation Jöns Jakob Berzelius (1825) Named by Martin Heinrich Klaproth (1795)
File:Symbol category class.svg Category: Titanium | references
References
These references will appear in the article, but this list appears only on this page.
↑ "titanium" . Lexico UK English Dictionary . Oxford University Press . Archived from the original on 2019-12-20.
↑ "Standard Atomic Weights: Titanium" . CIAAW . 1993.
↑ Jilek, Robert E.; Tripepi, Giovanna; Urnezius, Eugenijus; Brennessel, William W.; Young, Victor G. Jr.; Ellis, John E. (2007). "Zerovalent titanium–sulfur complexes. Novel dithiocarbamato derivatives of Ti(CO)6 :[Ti(CO)4 (S2 CNR2 )]− ". Chem. Commun. (25): 2639– 2641. doi :10.1039/B700808B . PMID 17579764 .
↑ Andersson, N.; et al. (2003). "Emission spectra of TiH and TiD near 938 nm" (PDF) . J. Chem. Phys . 118 (8): 10543. Bibcode :2003JChPh.118.3543A . doi :10.1063/1.1539848 .
↑ Weast, Robert (1984). CRC, Handbook of Chemistry and Physics . Boca Raton, Florida: Chemical Rubber Company Publishing. pp. E110. ISBN 0-8493-0464-4 .
↑ Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). "The NUBASE2020 evaluation of nuclear properties" (PDF) . Chinese Physics C . 45 (3): 030001. doi :10.1088/1674-1137/abddae .
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