Zirconium
Transition Metal
Zirconium (Zr) is a chemical element with atomic number 40, classified as a transition metal. At room temperature it is a solid. It was discovered in 1789 by Martin Heinrich Klaproth.
Properties
- Atomic number
- 40
- Atomic mass
- 91.224 u
- Category
- Transition Metal
- Group
- 4
- Period
- 5
- Block
- d-block
- Electron configuration
- [Kr] 4d² 5s²
- Phase at STP
- Solid
- Density
- 6.506 g/cm³
- Melting point
- 2128 K (1854.8 °C)
- Boiling point
- 4682 K (4408.9 °C)
- Electronegativity
- 1.33
- Atomic radius
- 206 pm
- Ionization energy
- 6.634 eV
- Discovery
- 1789 · Martin Heinrich Klaproth
Common uses
Nuclear reactors, jet engines, artificial diamonds, ceramics
Did you know?
Extremely corrosion-resistant and used in nuclear reactor cores.