روديوم (Rh)
روديوم is the chemical element with atomic number 45 and symbol Rh. It is a فلز انتقالي in period 5, group 9, with a standard atomic weight of 102.91 u.
حقائق أساسية
- Z
- 45
- Atomic weight
- 102.91 u
- Category
- فلز انتقالي
- State at 298 K
- Solid
- Occurrence
- primordial
- Discovered
- 1803
- CAS
- 7440-16-6
الخصائص المقيسة
| Property | Value | Source |
|---|---|---|
| Electronegativity | 2.28 | National Center for Biotechnology Information (NIH) |
| Melting point | 2,237 K | National Center for Biotechnology Information (NIH) |
| Boiling point | 3,968 K | National Center for Biotechnology Information (NIH) |
| Density stp | 12.4 g/cm³ | National Center for Biotechnology Information (NIH) |
| Atomic radius empirical | 195 pm | National Center for Biotechnology Information (NIH) |
| Ionization energy 1st | 719.7 kJ/mol | National Center for Biotechnology Information (NIH) |
| Electron affinity | 109.7 kJ/mol | National Center for Biotechnology Information (NIH) |
التوزيع الإلكتروني
- Noble gas notation
- [Kr] 4d⁸ 5s¹
- Full notation
- 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d⁸ 5s¹
- Electrons per shell
- 2, 8, 18, 16, 1