Chemicool

Ti

22

47.90
Titanium
General | States | Energies | Oxidation & Electrons |Appearance & Characteristics
Reactions | Other Forms |Radius | Conductivity | Abundance
Encyclopedia Britannica articles

General
Name Titanium Symbol Ti
atomic number 22 Atomic weight 47.90
Density @ 293 K 4.50 g/cm3 Atomic volume 10.64 cm3/mol
Group Trans. Met. discovered 1791

States
state (s, l, g) s
melting point 1933.2 K boiling point 3558 K
Heat of fusion 15.450 kJ/mol Heat of vaporization 421.00 kJ/mol
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Energies
1st ionization energy 658 kJ/mole electronegativity 1.54
2nd ionization energy 1310.3 kJ/mole electron affinity 7.6 kJ/mole
3rd ionization energy 2652.5 kJ/mole Specific heat 0.52 J/gK
heat atomization 470 kJ/mole atoms

Oxidation & Electrons
Shells 2,8,10,2 electron configuration [Ar] 3d2 4s2
minimum oxidation number -1 maximum oxidation number 4
min. common oxidation no. 0 max. common oxidation no. 4
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Appearance & Characteristics
structure hcp: hexagonal close pkd color gray
uses steel,white pigment(TiO2) toxicity
hardness mohs characteristics max strength/weight ratio

Reactions
reaction with air mild, w/ht = TiO2, TiN reaction with 6M HCl none
reaction with 6M HCl none reaction with 15M HNO3 passivated
reaction with 6M NaOH none
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Other Forms
number of isotopes 5 hydride(s) TiH2
oxide(s) TiO Ti2O3 TiO2 + more chloride(s) TiCl2 TiCl3 TiCl4

Radius
ionic radius (2- ion) pm ionic radius (1- ion) pm
atomic radius 147 pm ionic radius (1+ ion) pm
ionic radius (2+ ion) 100 pm ionic radius (3+ ion) 81 pm
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Conductivity
thermal conductivity 21.9 J/m-sec-deg electrical conductivity 23.81 1/mohm-cm
polarizability 14.6 A^3

Abundance
source Ilmenite, rutile(oxide) rel. abund. solar system 3.380 log
abundance earth's crust 3.8 log cost, pure 6.1 $/100g
cost, bulk $/100g
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