9 - Fluorine diatomic nonmetal
Discovered by André-Marie Ampère in 1886
- Atomic Radius (Å)
Fluorine is a chemical element with symbol F and atomic number 9. It is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. As the most electronegative element, it is extremely reactive:almost all other elements, including some noble gases, form compounds with fluorine.
| Shell | Electrons | Orbitals |
|---|---|---|
| 1 | 2 | 2 in 1s |
| 2 | 7 | 2 in 2s + 5 in 2p |
19 u
Atomic Mass
0.57 Å
Atomic Radius
85.03 K
Boiling Point
0.57 Å
Covalent Radius
1.70e-3 g/cm³
Density
328.16
Electron Affinity
3.98
Electronegativity
17.42 eV
First Ionization Energy
53.63 K
Melting Point
2
Number of Shells
7
Electron Valency
9
Atomic Number
2, 7
Electron Shell Occupations
0.82 J/(g K)
Specific Heat
