fluorine

Symbol: F
Atomic number: 9
Atomic weight: 18.9984032
Group: 17
Group name: Halogen
Period: 2
Block: p
CAS ID: 7782-41-4
Shell structure: 2.7
Electron configuration: [He].2s2.2p5
State: |standardstate|
Melting point: 53.53 [or -219.62 °C (-363.32 °F)]
Boiling point: 85.03 [or -188.12 °C (-306.62 °F)]
Ionization energy/kJ per mol: 1681.0
Common oxidation states: -1
Pauling electronegativity: 3.98