كادميوم (Cd)
كادميوم is the chemical element with atomic number 48 and symbol Cd. It is a فلز انتقالي in period 5, group 12, with a standard atomic weight of 112.41 u.
حقائق أساسية
- Z
- 48
- Atomic weight
- 112.41 u
- Category
- فلز انتقالي
- State at 298 K
- Solid
- Occurrence
- primordial
- Discovered
- 1817
- CAS
- 7440-43-9
الخصائص المقيسة
| Property | Value | Source |
|---|---|---|
| Electronegativity | 1.69 | National Center for Biotechnology Information (NIH) |
| Melting point | 594.22 K | National Center for Biotechnology Information (NIH) |
| Boiling point | 1,040 K | National Center for Biotechnology Information (NIH) |
| Density stp | 8.69 g/cm³ | National Center for Biotechnology Information (NIH) |
| Atomic radius empirical | 158 pm | National Center for Biotechnology Information (NIH) |
| Ionization energy 1st | 867.8 kJ/mol | National Center for Biotechnology Information (NIH) |
التوزيع الإلكتروني
- Noble gas notation
- [Kr] 4d¹⁰ 5s²
- Full notation
- 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s²
- Electrons per shell
- 2, 8, 18, 18, 2