فلور (F)
فلور is the chemical element with atomic number 9 and symbol F. It is a لافلز نشط in period 2, group 17, with a standard atomic weight of 18.998 u.
حقائق أساسية
- Z
- 9
- Atomic weight
- 18.998 u
- Category
- لافلز نشط
- State at 298 K
- Gas
- Occurrence
- primordial
- Discovered
- 1810
- CAS
- 14762-94-8
الخصائص المقيسة
| Property | Value | Source |
|---|---|---|
| Electronegativity | 3.98 | National Center for Biotechnology Information (NIH) |
| Melting point | 53.53 K | National Center for Biotechnology Information (NIH) |
| Boiling point | 85.03 K | National Center for Biotechnology Information (NIH) |
| Density stp | 0.002 g/cm³ | National Center for Biotechnology Information (NIH) |
| Atomic radius empirical | 135 pm | National Center for Biotechnology Information (NIH) |
| Ionization energy 1st | 1,681.1 kJ/mol | National Center for Biotechnology Information (NIH) |
| Electron affinity | 322.2 kJ/mol | National Center for Biotechnology Information (NIH) |
التوزيع الإلكتروني
- Noble gas notation
- [He] 2s² 2p⁵
- Full notation
- 1s² 2s² 2p⁵
- Electrons per shell
- 2, 7