40 Zr
Transition metal
Zirconium
Used in nuclear reactor cladding.
Properties of Zirconium
- Atomic number (Z)
- 40
- Symbol
- Zr
- Atomic mass
- 91.224 g/mol
- Category
- Transition metal
- Group
- 4
- Period
- 5
- Electron configuration
- [Kr] 4d² 5s²
- Electronegativity (Pauling)
- 1.33
- Atomic radius
- 206 pm
- First ionization energy
- 640 kJ/mol
- Melting point
- 2128 K (1854.8 °C)
- Boiling point
- 4682 K (4408.9 °C)
- Density
- 6.506 g/cm³
- Phase at 25 °C
- Solid
- Discovered
- Discovered in 1789