Periodic Table/Fluorine/²¹F

← 20F22F →

²¹F

Fluorine-21

Radioactive· Half-life: 4.16 s

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

9

Neutrons (N)

12

Mass Number (A)

21

Atomic Mass

20.999949AMU

Spin / Parity

5/2+

Binding E/A

7.519keV

Natural Abundance

Trace / None

Half-life

4.16 s

Decay Modesoverview · half-life · α · β⁻ · β⁺

β⁻

100.0%

Decay Chain

²¹FFluorine4.16 s

β⁻100.0%

²¹NeNeonSTABLE

2-step decay chain → stable · Primary path shown

Other Isotopes of Fluorine

13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31

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