Periodic Table/Helium/⁷He

← 6He8He →

⁷He

Helium-7

Radioactive· Half-life: 2.51 zs

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

2

Neutrons (N)

5

Mass Number (A)

7

Atomic Mass

7.027991AMU

Spin / Parity

3/2

Binding E/A

3.977keV

Natural Abundance

Trace / None

Half-life

2.51 zs

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

n

100.0%

Decay Chain

⁷HeHelium2.51 zs

n100.0%

⁶HeHelium807 ms

β⁻100.0%

B-d⁴He0.00%

⁶LiLithiumSTABLE

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

Other Isotopes of Helium

3 4 5 6 7 8 9 10

← Back to HeliumData: IAEA NDS · ENSDF