Atomic Properties
- Atomic Number
- 40
- Atomic Mass
- 91.2240 u
- Electron Configuration
- [Kr] 4d2 5s2
- Electronegativity
- 1.33
- Block
- d-block
- Group
- 4
- Period
- 5
Physical Properties
- Phase (STP)
- solid
- Melting Point
- 2128.00 K
- Boiling Point
- 4650.00 K
- Density
- 6.5200 g/cm³
About Zirconium
Corrosion-resistant; used in nuclear reactors and cubic zirconia gems.
Isotopes of Zirconium
Zirconium has 5 naturally occurring isotopes.
| Isotope | Mass Number | Atomic Mass (u) | Abundance | Type |
|---|---|---|---|---|
| 90Zr | 90 | 89.9046977 | 51.45% | Stable |
| 91Zr | 91 | 90.9056396 | 11.22% | Stable |
| 92Zr | 92 | 91.9050347 | 17.15% | Stable |
| 94Zr | 94 | 93.9063108 | 17.38% | Stable |
| 96Zr | 96 | 95.9082714 | 2.800% | Stable |
Data source: NIH PubChem (aggregated from IUPAC, NIST)