9 - Fluorine diatomic nonmetal

Discovered by André-Marie Ampère in 1886

  • Atomic Radius (Å)
  • Cividis
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.

H He Li Be B C N O F Ne Na Mg Al Si P S Cl Ar K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe Cs Ba La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn Fr Ra Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og
57-71 La-Lu Lanthanides
89-103 Ac-Lr Actinides
 Shell Electrons Orbitals
122 in 1s
272 in 2s + 5 in 2p
FluorineFElectron 1Electron 2Electron 1Electron 2Electron 3Electron 4Electron 5Electron 6Electron 7
19  u Atomic Mass
0.5  Å Atomic Radius
85  K Boiling Point
17 Group
-1 Common Oxidation States
0.57  Å Covalent Radius
0.0017  g/cm³ Density
328  kJ/mol Electron Affinity
1s2 2s2 2p5 Electron Configuration
[He] 2s2 2p5 Electron Configuration (semantic)
3.98 Electronegativity
9 Electrons
17.4  eV First Ionization Energy
-1 ICSD Oxidation States
1681, 3374.2, 6050.4, 8407.7, 11022.7, 15164.1, 17868, 92038.1, 106434.3  kJ/mol Ionization Energies
53.6  K Melting Point
102 Mendeleev Number
2 Number of Shells
7 Electron Valency
10 Neutrons
9 Atomic Number
6 Number of Isotopes
-1 Oxidation States
2 Period
Gas Phase
9 Protons
2, 7 Electron Shell Occupations
0.824  J/(g K) Specific Heat