Neon (10Ne) possesses three stable isotopes: 20
Ne
, 21
Ne
, and 22
Ne
. In addition, 17 radioactive isotopes have been discovered, ranging from 15
Ne
to 34
Ne
, all short-lived. The longest-lived is 24
Ne
with a half-life of 3.38(2) min. All others are under a minute, most under a second. The least stable is 15
Ne
with a half-life of 770(300) ys (7.7(3.0)×10−22 s). See isotopes of carbon for notes about the measurement. Light radioactive neon isotopes usually decay to fluorine or oxygen, while heavier ones decay to sodium.
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| Standard atomic weight Ar°(Ne) | ||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
List of isotopes
edit
| Nuclide [n 1] |
Z | N | Isotopic mass (Da)[4] [n 2][n 3] |
Half-life[1] [resonance width] |
Decay mode[1] [n 4] |
Daughter isotope [n 5] |
Spin and parity[1] [n 6] |
Natural abundance (mole fraction) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Excitation energy | Normal proportion[1] | Range of variation | |||||||||||||||||
| 15 Ne [5] |
10 | 5 | 15.043170(70) | 770(300) ys [590(230) keV] |
2p | 13 O |
(3/2−) | ||||||||||||
| 16 Ne |
10 | 6 | 16.025751(22) | > 5.7 zs [< 80 keV] |
2p | 14 O |
0 | ||||||||||||
| 17 Ne [n 7] |
10 | 7 | 17.0177140(4) | 109.2(6) ms | β p (94.4(2.9)%) | 16 O |
1/2− | ||||||||||||
| β α (3.51(1)%) | 13 N | ||||||||||||||||||
| β (2.1(2.9)%) | 17 F | ||||||||||||||||||
| β pα (0.014(4)%) | 12 C | ||||||||||||||||||
| 18 Ne |
10 | 8 | 18.0057087(4) | 1664.20(47) ms | β | 18 F |
0 | ||||||||||||
| 19 Ne |
10 | 9 | 19.00188091(17) | 17.2569(19) s | β | 19 F |
1/2 | ||||||||||||
| 20 Ne |
10 | 10 | 19.9924401753(16) | Stable | 0 | 0.9048(3) | [0.8847, 0.9051][6] | ||||||||||||
| 21 Ne |
10 | 11 | 20.99384669(4) | Stable | 3/2 | 0.0027(1) | [0.0027, 0.0171][6] | ||||||||||||
| 22 Ne |
10 | 12 | 21.991385114(19) | Stable | 0 | 0.0925(3) | [0.0920, 0.0996][6] | ||||||||||||
| 23 Ne |
10 | 13 | 22.99446691(11) | 37.15(3) s | β− | 23 Na |
5/2 | ||||||||||||
| 24 Ne |
10 | 14 | 23.9936106(6) | 3.38(2) min | β− | 24m Na |
0 | ||||||||||||
| 25 Ne |
10 | 15 | 24.997810(30) | 602(8) ms | β− | 25 Na |
1/2 | ||||||||||||
| 26 Ne |
10 | 16 | 26.000516(20) | 197(2) ms | β− (99.87(3)%) | 26 Na |
0 | ||||||||||||
| β−n (0.13(3)%) | 25 Na | ||||||||||||||||||
| 27 Ne |
10 | 17 | 27.007570(100) | 30.9(1.1) ms | β− (98.0(5)%) | 27 Na |
(3/2 ) | ||||||||||||
| β−n (2.0(5)%) | 26 Na | ||||||||||||||||||
| β−2n ?[n 8] | 25 Na ? | ||||||||||||||||||
| 28 Ne |
10 | 18 | 28.012130(140) | 18.8(2) ms | β− (84.3(1.1)%) | 28 Na |
0 | ||||||||||||
| β−n (12(1)%) | 27 Na | ||||||||||||||||||
| β−2n (3.7(5)%) | 26 Na | ||||||||||||||||||
| 29 Ne |
10 | 19 | 29.019750(160) | 14.7(4) ms | β− (68.0(5.1)%) | 29 Na |
(3/2−) | ||||||||||||
| β−n (28(5)%) | 28 Na | ||||||||||||||||||
| β−2n (4(1)%) | 27 Na | ||||||||||||||||||
| 30 Ne |
10 | 20 | 30.024990(270) | 7.22(18) ms | β− (78.1(4.6)%) | 30 Na |
0 | ||||||||||||
| β−n (13(4)%) | 29 Na | ||||||||||||||||||
| β−2n (8.9(2.3)%) | 28 Na | ||||||||||||||||||
| 31 Ne |
10 | 21 | 31.033470(290) | 3.4(8) ms | β− | 31 Na |
(3/2−) | ||||||||||||
| β−n ?[n 8] | 30 Na ? | ||||||||||||||||||
| β−2n ?[n 8] | 29 Na ? | ||||||||||||||||||
| 32 Ne |
10 | 22 | 32.039720(540)# | 3.5(9) ms | β− | 32 Na |
0 | ||||||||||||
| β−n ?[n 8] | 31 Na ? | ||||||||||||||||||
| β−2n ?[n 8] | 30 Na ? | ||||||||||||||||||
| 34 Ne |
10 | 24 | 34.056730(550)# | 2 ms# [> 1.5 μs] | β− ?[n 8] | 34 Na |
0 | ||||||||||||
| β−2n ?[n 8] | 32 Na ? | ||||||||||||||||||
| β−n ?[n 8] | 33 Na ? | ||||||||||||||||||
| This table header & footer: | |||||||||||||||||||
- ^ mNe – Excited nuclear isomer.
- ^ ( ) – Uncertainty (1σ) is given in concise form in parentheses after the corresponding last digits.
- ^ # – Atomic mass marked #: value and uncertainty derived not from purely experimental data, but at least partly from trends from the Mass Surface (TMS).
- ^
Modes of decay:
n: Neutron emission p: Proton emission - ^ Bold symbol as daughter – Daughter product is stable.
- ^ ( ) spin value – Indicates spin with weak assignment arguments.
- ^ Has 2 halo protons.
- ^ a b c d e f g h Decay mode shown is energetically allowed, but has not been experimentally observed to occur in this nuclide.
- The isotopic composition refers to that in air.
References
edit- ^ a b c d e Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). "The NUBASE2020 evaluation of nuclear properties" (PDF). Chinese Physics C. 45 (3): 030001. doi:10.1088/1674-1137/abddae.
- ^ "Standard Atomic Weights: Neon". CIAAW. 1985.
- ^ Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; Böhlke, John K.; Chesson, Lesley A.; Coplen, Tyler B.; Ding, Tiping; Dunn, Philip J. H.; Gröning, Manfred; Holden, Norman E.; Meijer, Harro A. J. (2022-05-04). "Standard atomic weights of the elements 2021 (IUPAC Technical Report)". Pure and Applied Chemistry. doi:10.1515/pac-2019-0603. ISSN 1365-3075.
- ^ Wang, Meng; Huang, W.J.; Kondev, F.G.; Audi, G.; Naimi, S. (2021). "The AME 2020 atomic mass evaluation (II). Tables, graphs and references*". Chinese Physics C. 45 (3): 030003. doi:10.1088/1674-1137/abddaf.
- ^ Wamers, F.; Marganiec, J.; Aksouh, F.; Aksyutina, Yu.; Álvarez-Pol, H.; Aumann, T.; Beceiro-Novo, S.; Boretzky, K.; Borge, M. J. G.; Chartier, M.; Chatillon, A.; Chulkov, L. V.; Cortina-Gil, D.; Emling, H.; Ershova, O.; Fraile, L. M.; Fynbo, H. O. U.; Galaviz, D.; Geissel, H.; Heil, M.; Hoffmann, D. H. H.; Johansson, H. T.; Jonson, B.; Karagiannis, C.; Kiselev, O. A.; Kratz, J. V.; Kulessa, R.; Kurz, N.; Langer, C.; Lantz, M.; Le Bleis, T.; Lemmon, R.; Litvinov, Yu. A.; Mahata, K.; Müntz, C.; Nilsson, T.; Nociforo, C.; Nyman, G.; Ott, W.; Panin, V.; Paschalis, S.; Perea, A.; Plag, R.; Reifarth, R.; Richter, A.; Rodriguez-Tajes, C.; Rossi, D.; Riisager, K.; Savran, D.; Schrieder, G.; Simon, H.; Stroth, J.; Sümmerer, K.; Tengblad, O.; Weick, H.; Wimmer, C.; Zhukov, M. V. (4 April 2014). "First Observation of the Unbound Nucleus 15Ne" (PDF). Physical Review Letters. 112 (13): 132502. doi:10.1103/PhysRevLett.112.132502. PMID 24745409 – via APS.
- ^ a b c Meija, Juris; Coplen, Tyler B.; Berglund, Michael; Brand, Willi A.; Bièvre, Paul De; Gröning, Manfred; Holden, Norman E.; Irrgeher, Johanna; Loss, Robert D.; Walczyk, Thomas; Prohaska, Thomas (2016-03-01). "Isotopic compositions of the elements 2013 (IUPAC Technical Report)". Pure and Applied Chemistry. 88 (3): 293–306. doi:10.1515/pac-2015-0503. hdl:11858/00-001M-0000-0029-C408-7. ISSN 1365-3075. S2CID 104472050.