鈉的同位素

鈉（原子量：22.98976928(2)）共有22個已知同位素，質量數介於18-37之間，其中只有1個是穩定的，其他都具有放射性，因此鈉屬於單一同位素元素。天然存在的鈉同位素有3個，分別是穩定的23Na和具放射性的22Na及24Na，其中23Na占天然鈉的絕大部分，而22Na和24Na在自然界中僅痕量存在，為宇宙射線散裂所產生。其他放射性同位素都不出現在自然界中，只有在實驗室製造出來過，且半衰期都極短，非常不穩定。

圖表

|-
| rowspan=2|
| rowspan=2 style="text-align:right" | 11
| rowspan=2 style="text-align:right" | 7
| rowspan=2|
| rowspan=2|
| p (>99.9%)
| 17Ne
| rowspan=2|(1−)#
| rowspan=2|
|-
|  (<.1%)
| 18Ne
|-
| 
| style="text-align:right" | 11
| style="text-align:right" | 8
| 
| <40 ns
| p
| 18Ne
| (5/2+)#
|
|-
| rowspan=2|
| rowspan=2 style="text-align:right" | 11
| rowspan=2 style="text-align:right" | 9
| rowspan=2|
| rowspan=2|447.9(23) ms
| β+ (75%)
| 20Ne
| rowspan=2|2+
| rowspan=2|
|-
| β+, α (25%)
| 16O
|-
| 
| style="text-align:right" | 11
| style="text-align:right" | 10
| 
| 22.49(4) s
| β+
| 21Ne
| 3/2+
| 
|-
| 
| style="text-align:right" | 11
| style="text-align:right" | 11
| 
| 2.6027(10) y
| β+
| 22Ne
| 3+
| 痕量
|-
| style="text-indent:1em" | 
| colspan="3" style="text-indent:2em" | 583.03(9) keV
| 244(6) ns
|
|
| 1+
|
|-
| 
| style="text-align:right" | 11
| style="text-align:right" | 12
| 
| colspan=3 align=center|
| 3/2+
| 
|-
| 
| style="text-align:right" | 11
| style="text-align:right" | 13
| 
| 
| β−
| 24Mg
| 4+
| 痕量
|-
| rowspan=2 style="text-indent:1em" | 
| rowspan=2 colspan="3" style="text-indent:2em" | 472.207(9) keV
| rowspan=2|20.20(7) ms
| IT (99.95%)
| 24Na
| rowspan=2|1+
| rowspan=2|
|-
| β− (.05%)
| 24Mg
|-
| 
| style="text-align:right" | 11
| style="text-align:right" | 14
| 
| 59.1(6) s
| β−
| 25Mg
| 5/2+
|
|-
| 
| style="text-align:right" | 11
| style="text-align:right" | 15
| 
| 1.077(5) s
| β−
| 26Mg
| 3+
|
|-
| rowspan=2|
| rowspan=2 style="text-align:right" | 11
| rowspan=2 style="text-align:right" | 16
| rowspan=2| 
| rowspan=2| 301(6) ms
| β− (99.87%)
| 27Mg
| rowspan=2|5/2+
| rowspan=2|
|-
| β−, n (.13%)
| 26Mg
|-
| rowspan=2|
| rowspan=2 style="text-align:right" | 11
| rowspan=2 style="text-align:right" | 17
| rowspan=2|
| rowspan=2|30.5(4) ms
| β− (99.421%)
| 28Mg
| rowspan=2|1+
| rowspan=2|
|-
| β−, n (.579%)
| 27Mg
|-
| rowspan=2|
| rowspan=2 style="text-align:right" | 11
| rowspan=2 style="text-align:right" | 18
| rowspan=2|
| rowspan=2|44.9(12) ms
| β− (74.09%)
| 29Mg
| rowspan=2|3/2(+#)
| rowspan=2|
|-
| β−, n (25.91%)
| 28Mg
|-
| rowspan=4|
| rowspan=4 style="text-align:right" | 11
| rowspan=4 style="text-align:right" | 19
| rowspan=4|
| rowspan=4|48.4(17) ms
| β− (68.83%)
| 30Mg
| rowspan=4|2+
| rowspan=4|
|-
| β−, n (30.0%)
| 29Mg
|-
| β−, 2n (1.17%)
| 28Mg
|-
| β−, α
| 26Ne
|-
| rowspan=4|
| rowspan=4 style="text-align:right" | 11
| rowspan=4 style="text-align:right" | 20
| rowspan=4|
| rowspan=4|17.0(4) ms
| β− (62.05%)
| 31Mg
| rowspan=4|(3/2+)
| rowspan=4|
|-
| β−, n
| 30Mg
|-
| β−, 2n
| 29Mg
|-
| β−, 3n
| 28Mg
|-
| rowspan=3|
| rowspan=3 style="text-align:right" | 11
| rowspan=3 style="text-align:right" | 21
| rowspan=3|
| rowspan=3|12.9(7) ms
| β−
| 32Mg
| rowspan=3|(3−,4−)
| rowspan=3|
|-
| β−, n
| 31Mg
|-
| β−, 2n
| 30Mg
|-
| rowspan=3|
| rowspan=3 style="text-align:right" | 11
| rowspan=3 style="text-align:right" | 22
| rowspan=3|
| rowspan=3|8.2(2) ms
| β−, n (52.0%)
| 32Mg
| rowspan=3|3/2+#
| rowspan=3|
|-
| β− (36.0%)
| 33Mg
|-
| β−, 2n (12.0%)
| 31Mg
|-
| rowspan=3|
| rowspan=3 style="text-align:right" | 11
| rowspan=3 style="text-align:right" | 23
| rowspan=3|#
| rowspan=3|5.5(10) ms
| β−, 2n (50.0%)
| 32Mg
| rowspan=3|1+
| rowspan=3|
|-
| β− (35.0%)
| 34Mg
|-
| β−, n (15.0%)
| 33Mg
|-
| rowspan=2|
| rowspan=2 style="text-align:right" | 11
| rowspan=2 style="text-align:right" | 24
| rowspan=2|#
| rowspan=2|1.5(5) ms
| β− (>99.9%)
| 35Mg
| rowspan=2|3/2+#
| rowspan=2|
|-
| β−, n (<.1%)
| 34Mg
|-
| 
| style="text-align:right" | 11
| style="text-align:right" | 26
| 37.05934(103)#
| 1# ms [>1.5 µs]
|
|
| 3/2+#
|
|}

 參考文獻 

 Isotope masses from Ame2003 Atomic Mass Evaluation by G. Audi, A.H. Wapstra, C. Thibault, J. Blachot and O. Bersillon in Nuclear Physics A729 (2003).
 Half-life, spin, and isomer data selected from these sources. Editing notes on this article's talk page.
 Audi, Bersillon, Blachot, Wapstra. The Nubase2003 evaluation of nuclear and decay properties , Nuc. Phys. A 729, pp. 3-128 (2003).
 National Nuclear Data Center, Brookhaven National Laboratory. Information extracted from the NuDat 2.1 database  (retrieved Sept. 2005).
 David R. Lide (ed.), Norman E. Holden in CRC Handbook of Chemistry and Physics, 85th Edition, online version. CRC Press. Boca Raton, Florida (2005). Section 11, Table of the Isotopes.

Na
Category:钠