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Protactinium
Energy Levels of Argon
Fm (Symbol of Fermium)
88 (Atomic Number of Radium)
Neel Point of Thallium in °F

F

Fluorine

19 known isotopes (1 stable, 18 radioactive)

Show stable only

¹³F

Mass

13.045121 u

Abundance

—

Half-life

1.01 MeV (resonance width)

Spin/Parity

(5/2+)

Decay Mode(s)

Unknown

¹⁴F

Mass

14.034315 u

Abundance

—

Half-life

910 keV (resonance width)

Spin/Parity

2-

Decay Mode(s)

Unknown

¹⁵F

Mass

15.017785 u

Abundance

—

Half-life

660 keV (resonance width)

Spin/Parity

1/2+

Decay Mode(s)

Proton emission (100%)

¹⁶F

Mass

16.011460 u

Abundance

—

Half-life

40 keV (resonance width)

Spin/Parity

0-

Decay Mode(s)

Proton emission (100%)

¹⁷F

Mass

17.002095 u

Abundance

—

Half-life

64.49 seconds

Spin/Parity

5/2+

Decay Mode(s)

EC/β⁺ (100%)

¹⁸F

Mass

18.000937 u

Abundance

—

Half-life

109.77 m

Spin/Parity

1+

Decay Mode(s)

EC/β⁺ (100%)

¹⁹F Stable

Mass

18.998403 u

Abundance

100.0000%

Half-life

Stable

Spin/Parity

1/2+

Decay Mode(s)

—

²⁰F

Mass

19.999981 u

Abundance

—

Half-life

11.07 seconds

Spin/Parity

2+

Decay Mode(s)

β⁻ (100%)

²¹F

Mass

20.999949 u

Abundance

—

Half-life

4.158 seconds

Spin/Parity

5/2+

Decay Mode(s)

β⁻ (100%)

²²F

Mass

22.002999 u

Abundance

—

Half-life

4.23 seconds

Spin/Parity

(4+)

Decay Mode(s)

β⁻ (100%), β⁻n (11%)

²³F

Mass

23.003527 u

Abundance

—

Half-life

2.23 seconds

Spin/Parity

(5/2+)

Decay Mode(s)

β⁻ (100%), β⁻n (14%)

²⁴F

Mass

24.008099 u

Abundance

—

Half-life

382 milliseconds

Spin/Parity

(3+)

Decay Mode(s)

β⁻ (100%), β⁻n (5.9%)

²⁵F

Mass

25.012168 u

Abundance

—

Half-life

80 milliseconds

Spin/Parity

5/2+

Decay Mode(s)

β⁻ (100%), β⁻n (23.1%)

²⁶F

Mass

26.020048 u

Abundance

—

Half-life

8.2 milliseconds

Spin/Parity

1+

Decay Mode(s)

β⁻ (100%), β⁻n (13.5%)

²⁷F

Mass

27.026982 u

Abundance

—

Half-life

5.0 milliseconds

Spin/Parity

(5/2+)

Decay Mode(s)

β⁻ (100%), β⁻n (77%)

²⁸F

Mass

28.035860 u

Abundance

—

Half-life

0.046 attoseconds

Spin/Parity

—

Decay Mode(s)

Neutron emission (100%)

²⁹F

Mass

29.043103 u

Abundance

—

Half-life

2.5 milliseconds

Spin/Parity

—

Decay Mode(s)

β⁻ (100%), β⁻n (100%)

³⁰F

Mass

30.052561 u

Abundance

—

Half-life

Unknown

Spin/Parity

—

Decay Mode(s)

Unknown

³¹F

Mass

31.061023 u

Abundance

—

Half-life

Unknown

Spin/Parity

—

Decay Mode(s)

β⁻ (100%)

Decay mode abbreviations:

β⁻ = Beta minus decay, β⁺ = Beta plus decay, EC = Electron capture, α = Alpha decay

n = Neutron emission, p = Proton emission, SF = Spontaneous fission, IT = Isomeric transition

Conversions Print

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Name

Atomic Mass

Series

Metals

Nonmetals