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.
Experiment with the elements
Zirconium doesn't form any compounds in our lab yet, but the periodic table sandbox lets you combine dozens of other real elements into real compounds — water, table salt, ammonia and many more — with their true chemical formulas.