Periodic Table/Magnesium/⁴⁰Mg

← 39Mg41Mg →

⁴⁰Mg

Magnesium-40

Radioactive

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

12

Neutrons (N)

28

Mass Number (A)

40

Atomic Mass

40.053194AMU

Spin / Parity

0+

Binding E/A

6.445keV

Natural Abundance

Trace / None

Half-life

Unknown

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

β⁻

β⁻n

2n

Decay Chain

⁴⁰MgMagnesium?

β⁻

β⁻n³⁹Al

2n³⁸Mg

⁴⁰AlAluminum?

β⁻

β⁻n³⁹Si

2n³⁸Al

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

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

Other Isotopes of Magnesium

19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41

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