title: 5F
text: # 5F
  
  5F can refer to:
  
  * 5f electrons; see Electron configuration
  * 5-F-AMT, abbreviation for 5-Fluoro-AMT
  * 5F, the production code for the 1979 Doctor Who serial The Armageddon Factor\
  * IATA code for Arctic Circle Air
  