Zirkonium (Zr)
Zirkonium is the chemical element with atomic number 40 and symbol Zr. It is a logam transisi in period 5, group 4, with a standard atomic weight of 91.224 u.
Fakta utama
- Z
- 40
- Atomic weight
- 91.224 u
- Category
- logam transisi
- State at 298 K
- Solid
- Occurrence
- primordial
- Discovered
- 1789
- CAS
- 7440-67-7
Sifat terukur
| Property | Value | Source |
|---|---|---|
| Electronegativity | 1.33 | National Center for Biotechnology Information (NIH) |
| Melting point | 2,128 K | National Center for Biotechnology Information (NIH) |
| Boiling point | 4,682 K | National Center for Biotechnology Information (NIH) |
| Density stp | 6.52 g/cm³ | National Center for Biotechnology Information (NIH) |
| Atomic radius empirical | 186 pm | National Center for Biotechnology Information (NIH) |
| Ionization energy 1st | 640.1 kJ/mol | National Center for Biotechnology Information (NIH) |
| Electron affinity | 41.1 kJ/mol | National Center for Biotechnology Information (NIH) |
Konfigurasi elektron
- Noble gas notation
- [Kr] 4d² 5s²
- Full notation
- 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d² 5s²
- Electrons per shell
- 2, 8, 18, 10, 2