- 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
1.7 g/liter 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