22
Ti
Titanium
47.867
Titanium (Ti)
Transition MetalGroup 4Period 4d-block-block
Titanium is a chemical element with symbol Ti and atomic number 22. It is a lustrous transition metal with a silver color, low density and high strength. It is highly resistant to corrosion in sea water, aqua regia and chlorine.
Latin name: Titanium
Atomic Number
22
Atomic Mass
47.867 g/mol
Phase (STP)
Solid
Electron Config.
[Ar] 3d² 4s²
General
SymbolTi
Atomic Number22
Atomic Mass47.867 g/mol
CategoryTransition Metal
Group4
Period4
Blockd-block
Electron Configuration[Ar] 3d² 4s²
Valence Electrons4
Coloursilvery-metallic
Appearancesilvery grey-white metallic
CAS NumberCAS7440-32-6
Physical Properties
Phase (STP)Solid
Density4.54 g/cm³
Melting Point1660.00°C · 3020.00°F · 1933.15 K
Boiling Point3287.00°C · 5948.60°F · 3560.15 K
Atomic Properties
Atomic Radius176 pm
Electronegativity1.54 Pauling
Ionization Energy658 kJ/mol
Oxidation States+4, +3, +2
Ion ChargeTi2+/Ti3+/Ti4+
Thermodynamic
Molar Heat25.06 J/(mol·K)
Crystal Structure
Crystal Structurehexagonal close-packed (α) → bcc (β)
Mechanical Properties
Mohs Hardness6
Abundance
In Earth's Crust0.6300%
Discovery & History
Discovery Year1791
Discovered ByWilliam Gregor
Country of DiscoveryEngland
Named ByMartin Heinrich Klaproth
Isotopes of Titanium
| Isotope | Abundance | Half-life | Decay |
|---|---|---|---|
| Ti-46 | 8.25% | Stable | — |
| Ti-47 | 7.44% | Stable | — |
| Ti-48 | 73.72% | Stable | — |
| Ti-49 | 5.41% | Stable | — |
| Ti-50 | 5.18% | Stable | — |