Isotopen van natrium
Het chemisch element natrium (Na), met een atoommassa van 22,98976928(2) u, kent in totaal 13 isotopen, waarvan enkel 23Na stabiel is. 22Na en 24Na zijn de enige nog van nature aanwezige radioactieve isotopen. Alle andere isotopen kunnen alleen op kunstmatige wijze worden verkregen.
Overzicht
[bewerken | brontekst bewerken]| Nuclide | Z (p) | N (n) | Isotopische massa (u) | Halveringstijd | Radioactief verval | VP | Kernspin | Isotopische verhouding (molfractie) |
Natuurlijk voorkomen (molfractie) |
|---|---|---|---|---|---|---|---|---|---|
| Excitatie-energie | |||||||||
| 18Na | 11 | 7 | 18,02597(5) | 1,3(4) × 10−21 s | p (> 99,9%) | 17Ne | (1−) | ||
| β+ (< 0,1%) | 18Ne | ||||||||
| 19Na | 11 | 8 | 19,013877(13) | < 40 ns | p | 18Ne | (5/2+) | ||
| 20Na | 11 | 9 | 20,007351(7) | 447,9(23) ms | β+ (75%) | 20Ne | 2+ | ||
| β+, α (25%) | 16O | ||||||||
| 21Na | 11 | 10 | 20,9976552(8) | 22,49(4) s | β+ | 21Ne | 3/2+ | ||
| 22Na | 11 | 11 | 21,9944364(4) | 2,6027(10) jaar | β+ | 22Ne | 3+ | sporen | |
| 22mNa | 583,03(9) keV | 244(6) ns | 1+ | ||||||
| 23Na | 11 | 12 | 22,9897692809(29) | stabiel | 3/2+ | 1,0000 | |||
| 24Na | 11 | 13 | 23,99096278(8) | 14,9590(12) uur | β− | 24Mg | 4+ | sporen | |
| 24mNa | 472,207(9) keV | 20,20(7) ms | IT (99,95%) | 24Na | 1+ | ||||
| β− (0,05%) | 24Mg | ||||||||
| 25Na | 11 | 14 | 24,9899540(13) | 59,1(6) s | β− | 25Mg | 5/2+ | ||
| 26Na | 11 | 15 | 25,992633(6) | 1,077(5) s | β− | 26Mg | 3+ | ||
| 27Na | 11 | 16 | 26,994077(4) | 301(6) ms | β− (99,87%) | 27Mg | 5/2+ | ||
| β−, n (,13%) | 26Mg | ||||||||
| 28Na | 11 | 17 | 27,998938(14) | 30,5(4) ms | β− (99,421%) | 28Mg | 1+ | ||
| β−, n (0,579%) | 27Mg | ||||||||
| 29Na | 11 | 18 | 29,002861(14) | 44,9(12) ms | β− (74,09%) | 29Mg | 3/2+ | ||
| β−, n (25,91%) | 28Mg | ||||||||
| 30Na | 11 | 19 | 30,008976(27) | 48,4(17) ms | β− (68,83%) | 30Mg | 2+ | ||
| β−, n (30,0%) | 29Mg | ||||||||
| β−, 2n (1,17%) | 28Mg | ||||||||
| β−, α | 26Ne | ||||||||
| 31Na | 11 | 20 | 31,01359(23) | 17,0(4) ms | β− (62,05%) | 31Mg | (3/2+) | ||
| β−, n | 30Mg | ||||||||
| β−, 2n | 29Mg | ||||||||
| β−, 3n | 28Mg | ||||||||
| 32Na | 11 | 21 | 32,02047(38) | 12,9(7) ms | β− | 32Mg | (3−, 4−) | ||
| β−, n | 31Mg | ||||||||
| β−, 2n | 30Mg | ||||||||
| 33Na | 11 | 22 | 33,02672(94) | 8,2(2) ms | β−, n (52,0%) | 32Mg | 3/2+ | ||
| β− (36,0%) | 33Mg | ||||||||
| β−, 2n (12,0%) | 31Mg | ||||||||
| 34Na | 11 | 23 | 34,03517(96) | 5,5(10) ms | β−, 2n (50,0%) | 32Mg | 1+ | ||
| β− (35,0%) | 34Mg | ||||||||
| β−, n (15,0%) | 33Mg | ||||||||
| 35Na | 11 | 24 | 35,04249(102) | 1,5(5) ms | β− (> 99,9%) | 35Mg | 3/2+ | ||
| β−, n (< 0,1%) | 34Mg | ||||||||
| 36Na | 11 | 25 | 36,05148(102) | < 260 ns | |||||
| 37Na | 11 | 26 | 37,05934(103) | 1 ms [> 1,5 µs] | 3/2+ | ||||
Overzicht van isotopen per element
[bewerken | brontekst bewerken]| 1 | 18 | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | H | 2 | Periodiek systeem | 13 | 14 | 15 | 16 | 17 | He | |||||||||
| 2 | Li | Be | De links verwijzen naar isotopen per element | B | C | N | O | F | Ne | |||||||||
| 3 | Na | Mg | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | Al | Si | P | S | Cl | Ar |
| 4 | K | Ca | Sc | Ti | V | Cr | Mn | Fe | Co | Ni | Cu | Zn | Ga | Ge | As | Se | Br | Kr |
| 5 | Rb | Sr | Y | Zr | Nb | Mo | Tc | Ru | Rh | Pd | Ag | Cd | In | Sn | Sb | Te | I | Xe |
| 6 | Cs | Ba | ↓ | Hf | Ta | W | Re | Os | Ir | Pt | Au | Hg | Tl | Pb | Bi | Po | At | Rn |
| 7 | Fr | Ra | ↓↓ | Rf | Db | Sg | Bh | Hs | Mt | Ds | Rg | Cn | Nh | Fl | Mc | Lv | Ts | Og |
| Lanthaniden | La | Ce | Pr | Nd | Pm | Sm | Eu | Gd | Tb | Dy | Ho | Er | Tm | Yb | Lu | |||
| Actiniden | Ac | Th | Pa | U | Np | Pu | Am | Cm | Bk | Cf | Es | Fm | Md | No | Lr | |||
Bronnen, noten en/of referenties
- (en) R.B. Firestone, S.Y. Frank Chu & C.M. Baglin (1999) - Table of Isotopes (online versie van de cd-rom)
- (en) G. Audi, A.H. Wapstra, C. Thibault, J. Blachot & O. Bersillon (2003) - The NUBASE evaluation of nuclear and decay properties, Nuclear Physics A, 729, pp. 3-128
- (en) J.R. de Laeter, J.K. Böhlke, P. De Bièvre, H. Hidaka, H.S. Peiser, K.J.R. Rosman & P.D.P. Taylor (2003) - Atomic weights of the elements. Review 2000 (IUPAC Technical Report), Pure and Applied Chemistry, 75 (6), pp. 683–800
- (en) Nudat 2.5
- (en) M.E. Wieser (2006) - Atomic weights of the elements 2005 (IUPAC Technical Report), Pure and Applied Chemistry, 78 (11), pp. 2051–2066
- (en) David R. Lide (2004) - CRC Handbook of Chemistry and Physics (85th ed.), hoofdstuk 11, CRC Press - ISBN 978-0849304859
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