40Solid
Zr 91.224 Atomic mass · uTransition metals
Zirconium
Zirconium is a chemical element with symbol Zr and atomic number 40. The name of zirconium is taken from the name of the mineral zircon, the most important source of zirconium. The word zircon comes from the Persian word zargun زرگون, meaning "gold-colored".
Discovery 1789 (Martin Heinrich Klaproth)
K2L8M18N10O2
Physical properties
Values for the element in its standard state.
- Density
- 6.511g/cm³
- Melting point
- 2,128K
- Boiling point
- 4,682K
- Atomic radius
- 148pm
- Bonding type
- Metallic
- Molar heat
- 25.36J/(mol·K)
Inside the atom
Electron arrangement and the energy behind its behavior.
Full electron configuration
1s, 2 electrons; 2s, 2 electrons; 2p, 6 electrons; 3s, 2 electrons; 3p, 6 electrons; 3d, 10 electrons; 4s, 2 electrons; 4p, 6 electrons; 4d, 2 electrons; 5s, 2 electrons;
[Kr] represents 36 core electrons. The full view shows them explicitly.
40 electrons Orbital order preserved from source
- Electronegativity
- 1.33Pauling scale
- First ionization energy
- 640kJ/mol
- Electron affinity
- 41kJ/mol
- Van der Waals radius
- Not available
Zr ZirconiumAtomic number 40
640kJ/mol
Atomic numberGaps indicate unavailable data
About zirconium
- Appearance
- Silvery white
- Discovery
- 1789 (Martin Heinrich Klaproth)
- Data source
- Read the reference
A missing value means it is unavailable in this reference dataset. Values can vary with measurement method and conditions.