- 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
Atomic Mass (u)
53.63
Melting Point (K)
85.03
Boiling Point (K)
1.7
Density (solid: g/cm³, gas: g/liter)
0.57
Atomic Radius (Å)
0.57
Covalent Radius (Å)
3.98
Electronegativity
17.42
First Ionization Energy (eV)
328.16
Electron Affinity
2
Number of Shells
7
Electron Valency
2, 7
Electron Shell Occupations
0.82
Specific Heat (J/g)