5F

5F may refer to:

5f electrons, of an electron configuration
The Armageddon Factor (production code: 5F), a 1979 Doctor Who serial
FlyOne (IATA code: 5F), a Moldovan low-cost airline
Arctic Circle Air (former IATA code: 5F), a former US-American airline

See also[edit]

5-Fluoro-AMT (5-F-AMT)
F5 (disambiguation)

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