Atomic Properties
- Atomic Number
- 9
- Atomic Mass
- 18.9980 u
- Electron Configuration
- [He] 2s2 2p5
- Electronegativity
- 3.98
- Block
- p-block
- Group
- 17
- Period
- 2
Physical Properties
- Phase (STP)
- gas
- Melting Point
- 53.48 K
- Boiling Point
- 85.03 K
- Density
- 0.0017 g/cm³
About Fluorine
Most electronegative element; used in toothpaste and Teflon.
Isotopes of Fluorine
Fluorine has 1 naturally occurring isotope.
| Isotope | Mass Number | Atomic Mass (u) | Abundance | Type |
|---|---|---|---|---|
| 19F | 19 | 18.99840316 | 100.00% | Stable |
Data source: NIH PubChem (aggregated from IUPAC, NIST)