Isotopes of neon

Neon (Ne) possesses three stable isotopes, 20Ne, 21Ne, and 22Ne. In addition, 16 radioactive isotopes have been discovered ranging from 16Ne to 34Ne, all short-lived. The longest-lived is 24Ne with a half-life of 3.38 minutes. All others are under a minute, most under a second. The least stable is 16Ne with a half-life of 9×10−21 s. See isotopes of carbon for notes about the measurement.

Relative atomic mass: 20.1797(6).

A chart showing the abundances of the naturally-occurring isotopes of neon.

Table

nuclide
symbol
Z(p) N(n)  
isotopic mass (u)
 
half-life decay mode(s)[1] daughter
isotope(s)[n 1]
nuclear
spin
representative
isotopic
composition
(mole fraction)
range of natural
variation
(mole fraction)
16Ne 10 6 16.025761(22) 9×10−21 s
[122(37) keV]
2p 14O 0+
17Ne[n 2] 10 7 17.017672(29) 109.2(6) ms β+, p (96.0%) 16O 1/2–
β+, α (2.7%) 13N
β+ (1.3%) 17F
18Ne 10 8 18.0057082(3) 1.672(8) s Electron capture (EC) 18F 0+
2p (possibly 2He)[2] 16O
19Ne 10 9 19.0018802(3) 17.296(5) s+ β+ 19F 1/2+
20Ne 10 10 19.9924401754(19) Stable 0+ 0.9048(3) 0.8847–0.9051
21Ne 10 11 20.99384668(4) Stable 3/2+ 0.0027(1) 0.0027–0.0171
22Ne 10 12 21.991385114(19) Stable 0+ 0.0925(3) 0.0920–0.0996
23Ne 10 13 22.99446690(11) 37.24(12) s β 23Na 5/2+
24Ne 10 14 23.9936108(4) 3.38(2) min β 24Na 0+
25Ne 10 15 24.997737(28) 602(8) ms β 25Na (3/2)+
26Ne 10 16 26.000461(29) 197(1) ms β (99.87%) 26Na 0+
β, n (.13%) 25Na
27Ne 10 17 27.00759(12) 32(2) ms β (98.0%) 27Na (3/2+)#
β, n (2.0%) 26Na
28Ne 10 18 28.01207(16) 18.3(22) ms β (78.0%) 28Na 0+
β, n (22.0%) 27Na
29Ne 10 19 29.01939(29) 15.6(5) ms β 29Na (3/2+)#
30Ne 10 20 30.02480(61) 5.8(2) ms β 30Na 0+
31Ne 10 21 31.03311(97)# 3.4(8) ms β 31Na 7/2−#
β, n 30Na
32Ne 10 22 32.04002(86)# 3.5(9) ms β, n 31Na 0+
β 32Na
33Ne 10 23 33.04938(86)# <260 ns 7/2−#
34Ne 10 24 34.05703(87)# 1# ms [>1.5 µs] 0+
  1. Bold for stable isotopes
  2. Has 2 halo protons

Notes

References

  1. "Universal Nuclide Chart". nucleonica. (registration required (help)).
  2. http://physicsworld.com/cws/article/news/2762
Isotopes of fluorine Isotopes of neon Isotopes of sodium
Table of nuclides
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