يوروبيوم (Eu)
يوروبيوم is the chemical element with atomic number 63 and symbol Eu. It is a لانثانيد in period 6, with a standard atomic weight of 151.96 u.
حقائق أساسية
- Z
- 63
- Atomic weight
- 151.96 u
- Category
- لانثانيد
- State at 298 K
- Solid
- Occurrence
- primordial
- Discovered
- 1901
- CAS
- 7440-53-1
الخصائص المقيسة
| Property | Value | Source |
|---|---|---|
| Melting point | 1,095 K | National Center for Biotechnology Information (NIH) |
| Boiling point | 1,802 K | National Center for Biotechnology Information (NIH) |
| Density stp | 5.24 g/cm³ | National Center for Biotechnology Information (NIH) |
| Atomic radius empirical | 233 pm | National Center for Biotechnology Information (NIH) |
| Ionization energy 1st | 547.1 kJ/mol | National Center for Biotechnology Information (NIH) |
التوزيع الإلكتروني
- Noble gas notation
- [Xe] 4f⁷ 6s²
- Full notation
- 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f⁷ 5s² 5p⁶ 6s²
- Electrons per shell
- 2, 8, 18, 25, 8, 2