- 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.
9
Atomic Number
19 u
Atomic Mass
53.63 K
Melting Point
85.03 K
Boiling Point
1.70e-3 g/cm³
Density
0.57 Å
Atomic Radius
0.57 Å
Covalent Radius
3.98
Electronegativity
17.42 eV
First Ionization Energy
328.16
Electron Affinity
2
Number of Shells
7
Electron Valency
2, 7
Electron Shell Occupations
0.82 J/g
Specific Heat