Periodic Table/Silicon/⁴⁰Si

← 39Si41Si →

⁴⁰Si

Silicon-40

Radioactive· Half-life: 31.2 ms

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

14

Neutrons (N)

26

Mass Number (A)

40

Atomic Mass

40.006084AMU

Spin / Parity

0+

Binding E/A

7.477keV

Natural Abundance

Trace / None

Half-life

31.2 ms

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

β⁻

100.0%

β⁻n

38.0%

2n

Decay Chain

⁴⁰SiSilicon31.2 ms

β⁻100.0%

β⁻n³⁹P38.0%

2n³⁸Si

⁴⁰PPhosphorus150 ms

β⁻100.0%

β⁻n³⁹S15.8%

2n³⁸P

⁴⁰SSulfur8.80 s

β⁻100.0%

⁴⁰ClChlorine1.35 min

β⁻100.0%

⁴⁰ArArgonSTABLE

5-step decay chain → stable · Primary path shown · branching ratios indicated

Other Isotopes of Silicon

22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45

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