Itrium (Y)
Itrium is the chemical element with atomic number 39 and symbol Y. It is a logam transisi in period 5, group 3, with a standard atomic weight of 88.906 u.
Fakta utama
- Z
- 39
- Atomic weight
- 88.906 u
- Category
- logam transisi
- State at 298 K
- Solid
- Occurrence
- primordial
- Discovered
- 1787
- CAS
- 7440-65-5
Sifat terukur
| Property | Value | Source |
|---|---|---|
| Electronegativity | 1.22 | National Center for Biotechnology Information (NIH) |
| Melting point | 1,795 K | National Center for Biotechnology Information (NIH) |
| Boiling point | 3,618 K | National Center for Biotechnology Information (NIH) |
| Density stp | 4.47 g/cm³ | National Center for Biotechnology Information (NIH) |
| Atomic radius empirical | 219 pm | National Center for Biotechnology Information (NIH) |
| Ionization energy 1st | 599.8 kJ/mol | National Center for Biotechnology Information (NIH) |
| Electron affinity | 29.6 kJ/mol | National Center for Biotechnology Information (NIH) |
Konfigurasi elektron
- Noble gas notation
- [Kr] 4d¹ 5s²
- Full notation
- 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹ 5s²
- Electrons per shell
- 2, 8, 18, 9, 2