« home

9 - Fluorine diatomic nonmetal

Discovered by André-Marie Ampère in 1886

Fluorine

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.

ShellElectronsOrbitals
122 in 1s
272 in 2s + 5 in 2p
FluorineFElectron 1Electron 2Electron 1Electron 2Electron 3Electron 4Electron 5Electron 6Electron 7
19  u Atomic Mass
0.57  Å Atomic Radius
85  K Boiling Point
0.57  Å Covalent Radius
0.0017  g/cm³ Density
328 Electron Affinity
3.98 Electronegativity
17.4  eV First Ionization Energy
53.6  K Melting Point
2 Number of Shells
7 Electron Valency
9 Atomic Number
2, 7 Electron Shell Occupations
0.824  J/(g K) Specific Heat