# Isotopen van natrium

Het chemisch element natrium (Na), met een atoommassa van 22,98976928(2) u, kent in totaal 13 isotopen, waarvan enkel $^{23}$Na stabiel is. $^{22}$Na en $^{24}$Na zijn de enige nog van nature aanwezige radioactieve isotopen. Alle andere isotopen kunnen alleen op kunstmatige wijze worden verkregen.

## Overzicht

| Nuclide | Z (p) | N (n) | Isotopische massa (u) | Halveringstijd | Radioactief verval | VP | Kernspin | Isotopische verhouding (molfractie) |
| Natuurlijk voorkomen (molfractie) |||
| $^{18}$Na | 11 | 7 | 18,02597(5) | 1,3(4) × 10$^{−21}$ s | p (> 99,9%) | $^{17}$Ne | (1$^−$) | |
| $^{18}$Na | 11 | 7 | 18,02597(5) | 1,3(4) × 10$^{−21}$ s | β$^+$ (< 0,1%) | $^{18}$Ne | (1$^−$) | |
| $^{19}$Na | 11 | 8 | 19,013877(13) | < 40 ns | p | $^{18}$Ne | (5/2$^+$) | |
| $^{20}$Na | 11 | 9 | 20,007351(7) | 447,9(23) ms | β$^+$ (75%) | $^{20}$Ne | 2$^+$ | |
| $^{20}$Na | 11 | 9 | 20,007351(7) | 447,9(23) ms | β$^+$, α (25%) | $^{16}$O | 2$^+$ | |
| $^{21}$Na | 11 | 10 | 20,9976552(8) | 22,49(4) s | β$^+$ | $^{21}$Ne | 3/2$^+$ | |
| $^{22}$Na | 11 | 11 | 21,9944364(4) | 2,6027(10) jaar | β$^+$ | $^{22}$Ne | 3$^+$ | sporen |
| $^{22m}$Na | 583,03(9) keV | 583,03(9) keV | 583,03(9) keV | 244(6) ns | | | 1$^+$ | |
| $^{23}$Na | 11 | 12 | 22,9897692809(29) | stabiel | stabiel | stabiel | 3/2$^+$ | 1,0000 |
| $^{24}$Na | 11 | 13 | 23,99096278(8) | 14,9590(12) uur | β$^−$ | $^{24}$Mg | 4$^+$ | sporen |
| $^{24m}$Na | 472,207(9) keV | 472,207(9) keV | 472,207(9) keV | 20,20(7) ms | IT (99,95%) | $^{24}$Na | 1$^+$ | |
| $^{24m}$Na | 472,207(9) keV | 472,207(9) keV | 472,207(9) keV | 20,20(7) ms | β$^−$ (0,05%) | $^{24}$Mg | 1$^+$ | |
| $^{25}$Na | 11 | 14 | 24,9899540(13) | 59,1(6) s | β$^−$ | $^{25}$Mg | 5/2$^+$ | |
| $^{26}$Na | 11 | 15 | 25,992633(6) | 1,077(5) s | β$^−$ | $^{26}$Mg | 3$^+$ | |
| $^{27}$Na | 11 | 16 | 26,994077(4) | 301(6) ms | β$^−$ (99,87%) | $^{27}$Mg | 5/2$^+$ | |
| $^{27}$Na | 11 | 16 | 26,994077(4) | 301(6) ms | β$^−$, n (,13%) | $^{26}$Mg | 5/2$^+$ | |
| $^{28}$Na | 11 | 17 | 27,998938(14) | 30,5(4) ms | β$^−$ (99,421%) | $^{28}$Mg | 1$^+$ | |
| $^{28}$Na | 11 | 17 | 27,998938(14) | 30,5(4) ms | β$^−$, n (0,579%) | $^{27}$Mg | 1$^+$ | |
| $^{29}$Na | 11 | 18 | 29,002861(14) | 44,9(12) ms | β$^−$ (74,09%) | $^{29}$Mg | 3/2$^+$ | |
| $^{29}$Na | 11 | 18 | 29,002861(14) | 44,9(12) ms | β$^−$, n (25,91%) | $^{28}$Mg | 3/2$^+$ | |
| $^{30}$Na | 11 | 19 | 30,008976(27) | 48,4(17) ms | β$^−$ (68,83%) | $^{30}$Mg | 2$^+$ | |
| $^{30}$Na | 11 | 19 | 30,008976(27) | 48,4(17) ms | β$^−$, n (30,0%) | $^{29}$Mg | 2$^+$ | |
| $^{30}$Na | 11 | 19 | 30,008976(27) | 48,4(17) ms | β$^−$, 2n (1,17%) | $^{28}$Mg | 2$^+$ | |
| $^{30}$Na | 11 | 19 | 30,008976(27) | 48,4(17) ms | β$^−$, α | $^{26}$Ne | 2$^+$ | |
| $^{31}$Na | 11 | 20 | 31,01359(23) | 17,0(4) ms | β$^−$ (62,05%) | $^{31}$Mg | (3/2$^+$) | |
| $^{31}$Na | 11 | 20 | 31,01359(23) | 17,0(4) ms | β$^−$, n | $^{30}$Mg | (3/2$^+$) | |
| $^{31}$Na | 11 | 20 | 31,01359(23) | 17,0(4) ms | β$^−$, 2n | $^{29}$Mg | (3/2$^+$) | |
| $^{31}$Na | 11 | 20 | 31,01359(23) | 17,0(4) ms | β$^−$, 3n | $^{28}$Mg | (3/2$^+$) | |
| $^{32}$Na | 11 | 21 | 32,02047(38) | 12,9(7) ms | β$^−$ | $^{32}$Mg | (3$^−$, 4$^−$) | |
| $^{32}$Na | 11 | 21 | 32,02047(38) | 12,9(7) ms | β$^−$, n | $^{31}$Mg | (3$^−$, 4$^−$) | |
| $^{32}$Na | 11 | 21 | 32,02047(38) | 12,9(7) ms | β$^−$, 2n | $^{30}$Mg | (3$^−$, 4$^−$) | |
| $^{33}$Na | 11 | 22 | 33,02672(94) | 8,2(2) ms | β$^−$, n (52,0%) | $^{32}$Mg | 3/2$^+$ | |
| $^{33}$Na | 11 | 22 | 33,02672(94) | 8,2(2) ms | β$^−$ (36,0%) | $^{33}$Mg | 3/2$^+$ | |
| $^{33}$Na | 11 | 22 | 33,02672(94) | 8,2(2) ms | β$^−$, 2n (12,0%) | $^{31}$Mg | 3/2$^+$ | |
| $^{34}$Na | 11 | 23 | 34,03517(96) | 5,5(10) ms | β$^−$, 2n (50,0%) | $^{32}$Mg | 1$^+$ | |
| $^{34}$Na | 11 | 23 | 34,03517(96) | 5,5(10) ms | β$^−$ (35,0%) | $^{34}$Mg | 1$^+$ | |
| $^{34}$Na | 11 | 23 | 34,03517(96) | 5,5(10) ms | β$^−$, n (15,0%) | $^{33}$Mg | 1$^+$ | |
| $^{35}$Na | 11 | 24 | 35,04249(102) | 1,5(5) ms | β$^−$ (> 99,9%) | $^{35}$Mg | 3/2$^+$ | |
| $^{35}$Na | 11 | 24 | 35,04249(102) | 1,5(5) ms | β$^−$, n (< 0,1%) | $^{34}$Mg | 3/2$^+$ | |
| $^{36}$Na | 11 | 25 | 36,05148(102) | < 260 ns | | | | |
| $^{37}$Na | 11 | 26 | 37,05934(103) | 1 ms [> 1,5 µs] | | | 3/2$^+$ | |

## Overzicht van isotopen per element

* (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
$^{17}$Na · $^{18}$Na · $^{19}$Na · $^{20}$Na · $^{21}$Na · $^{22}$Na · $^{22m}$Na · $^{23}$Na · $^{24}$Na · $^{24m}$Na · $^{25}$Na · $^{26}$Na · $^{27}$Na · $^{28}$Na · $^{29}$Na · $^{30}$Na · $^{31}$Na · $^{32}$Na · $^{33}$Na · $^{34}$Na · $^{35}$Na · $^{36}$Na · $^{37}$Na