Isotop radium

**[[Radium]]** (**<sub>88</sub>Ra**) tidak memiliki satu pun isotop yang stabil atau hampir stabil, sehingga demikian berat atom standarnya tidak dapat diberikan. Isotop radium yang berumur paling panjang dan paling umum adalah 226Ra dengan waktu paruh  tahun. 226Ra terjadi dalam rantai peluruhan <sup>238</sup>U (sering disebut sebagai deret radium). Radium memiliki 33 isotop yang diketahui, mulai dari 202Ra hingga 234Ra.

Pada tahun 2013 ditemukan bahwa inti 224Ra berbentuk seperti buah pir. Ini merupakan penemuan pertama dari sebuah inti yang asimetris.

## Daftar isotop

|-
| 202Ra
|
| style="text-align:right" | 88
| style="text-align:right" | 114
| 202,00989(7)
| 2,6(21)&nbsp;mdtk[0,7(+33−3)&nbsp;mdtk]
|
|
| 0+
|
|-
| rowspan=2|203Ra
| rowspan=2|
| rowspan=2 style="text-align:right" | 88
| rowspan=2 style="text-align:right" | 115
| rowspan=2|203,00927(9)
| rowspan=2|4(3)&nbsp;mdtk
| α
| 199Rn
| rowspan=2|(3/2−)
| rowspan=2|
|-
| β<sup>+</sup> (langka)
| 203Fr
|-
| rowspan=2 style="text-indent:1em" | 203mRa
| rowspan=2|
| rowspan=2 colspan="3" style="text-indent:2em" | 220(90)&nbsp;keV
| rowspan=2|41(17)&nbsp;mdtk
| α
| 199Rn
| rowspan=2|(13/2+)
| rowspan=2|
|-
| β+ (langka)
| 203Fr
|-
| rowspan=2|204Ra
| rowspan=2|
| rowspan=2 style="text-align:right" | 88
| rowspan=2 style="text-align:right" | 116
| rowspan=2|204,006500(17)
| rowspan=2|60(11)&nbsp;mdtk[59(+12−9)&nbsp;mdtk]
| α (99,7%)
| 200Rn
| rowspan=2|0+
| rowspan=2|
|-
| β+ (0,3%)
| 204Fr
|-
| rowspan=2|205Ra
| rowspan=2|
| rowspan=2 style="text-align:right" | 88
| rowspan=2 style="text-align:right" | 117
| rowspan=2|205,00627(9)
| rowspan=2|220(40)&nbsp;mdtk[210(+60−40)&nbsp;mdtk]
| α
| 201Rn
| rowspan=2|(3/2−)
| rowspan=2|
|-
| β+ (langka)
| 205Fr
|-
| rowspan=2 style="text-indent:1em" | 205mRa
| rowspan=2|
| rowspan=2 colspan="3" style="text-indent:2em" | 310(110)#&nbsp;keV
| rowspan=2|180(50)&nbsp;mdtk[170(+60−40)&nbsp;mdtk]
| α
| 201Rn
| rowspan=2|(13/2+)
| rowspan=2|
|-
| IT (langka)
| 205Ra
|-
| 206Ra
|
| style="text-align:right" | 88
| style="text-align:right" | 118
| 206,003827(19)
| 0,24(2)&nbsp;dtk
| α
| 202Rn
| 0+
|
|-
| rowspan=2|207Ra
| rowspan=2|
| rowspan=2 style="text-align:right" | 88
| rowspan=2 style="text-align:right" | 119
| rowspan=2|207,00380(6)
| rowspan=2|1,3(2)&nbsp;dtk
| α (90%)
| 203Rn
| rowspan=2|(5/2−, 3/2−)
| rowspan=2|
|-
| β+ (10%)
| 207Fr
|-
| rowspan=3 style="text-indent:1em" | 207mRa
| rowspan=3|
| rowspan=3 colspan="3" style="text-indent:2em" | 560(50)&nbsp;keV
| rowspan=3|57(8)&nbsp;mdtk
| IT (85%)
| 207Ra
| rowspan=3|(13/2+)
| rowspan=3|
|-
| α (15%)
| 203Rn
|-
| β+ (0,55%)
| 207Fr
|-
| rowspan=2|208Ra
| rowspan=2|
| rowspan=2 style="text-align:right" | 88
| rowspan=2 style="text-align:right" | 120
| rowspan=2|208,001840(17)
| rowspan=2|1,3(2)&nbsp;dtk
| α (95%)
| 204Rn
| rowspan=2|0+
| rowspan=2|
|-
| β+ (5%)
| 208Fr
|-
| style="text-indent:1em" | 208mRa
|
| colspan="3" style="text-indent:2em" | 1800(200)&nbsp;keV
| 270&nbsp;ndtk
|
|
| (8+)
|
|-
| rowspan=2|209Ra
| rowspan=2|
| rowspan=2 style="text-align:right" | 88
| rowspan=2 style="text-align:right" | 121
| rowspan=2|209,00199(5)
| rowspan=2|4,6(2)&nbsp;dtk
| α (90%)
| 205Rn
| rowspan=2|5/2−
| rowspan=2|
|-
| β+ (10%)
| 209Fr
|-
| rowspan=2|210Ra
| rowspan=2|
| rowspan=2 style="text-align:right" | 88
| rowspan=2 style="text-align:right" | 122
| rowspan=2|210,000495(16)
| rowspan=2|3,7(2)&nbsp;dtk
| α (96%)
| 206Rn
| rowspan=2|0+
| rowspan=2|
|-
| β+ (4%)
| 210Fr
|-
| style="text-indent:1em" | 210mRa
|
| colspan="3" style="text-indent:2em" | 1800(200)&nbsp;keV
| 2,24&nbsp;μdtk
|
|
| (8+)
|
|-
| rowspan=2|211Ra
| rowspan=2|
| rowspan=2 style="text-align:right" | 88
| rowspan=2 style="text-align:right" | 123
| rowspan=2|211,000898(28)
| rowspan=2|13(2)&nbsp;dtk
| α (97%)
| 207Rn
| rowspan=2|5/2(−)
| rowspan=2|
|-
| β+ (3%)
| 211Fr
|-
| rowspan=2|212Ra
| rowspan=2|
| rowspan=2 style="text-align:right" | 88
| rowspan=2 style="text-align:right" | 124
| rowspan=2|211,999794(12)
| rowspan=2|13,0(2)&nbsp;dtk
| α (85%)
| 208Rn
| rowspan=2|0+
| rowspan=2|
|-
| β+ (15%)
| 212Fr
|-
| style="text-indent:1em" | 212m1Ra
|
| colspan="3" style="text-indent:2em" | 1958,4(5)&nbsp;keV
| 10,9(4)&nbsp;μdtk
|
|
| (8)+
|
|-
| style="text-indent:1em" | 212m2Ra
|
| colspan="3" style="text-indent:2em" | 2613,4(5)&nbsp;keV
| 0,85(13)&nbsp;μdtk
|
|
| (11)−
|
|-
| rowspan=2|213Ra
| rowspan=2|
| rowspan=2 style="text-align:right" | 88
| rowspan=2 style="text-align:right" | 125
| rowspan=2|213,000384(22)
| rowspan=2|2,74(6)&nbsp;mnt
| α (80%)
| 209Rn
| rowspan=2|1/2−
| rowspan=2|
|-
| β+ (20%)
| 213Fr
|-
| rowspan=2 style="text-indent:1em" | 213mRa
| rowspan=2|
| rowspan=2 colspan="3" style="text-indent:2em" | 1769(6)&nbsp;keV
| rowspan=2|2,1(1)&nbsp;mdtk
| IT (99%)
| 213Ra
| rowspan=2|17/2−#
| rowspan=2|
|-
| α (1%)
| 209Rn
|-
| rowspan=2|214Ra
| rowspan=2|
| rowspan=2 style="text-align:right" | 88
| rowspan=2 style="text-align:right" | 126
| rowspan=2|214,000108(10)
| rowspan=2|2,46(3)&nbsp;dtk
| α (99,94%)
| 210Rn
| rowspan=2|0+
| rowspan=2|
|-
| β+ (0,06%)
| 214Fr
|-
| 215Ra
|
| style="text-align:right" | 88
| style="text-align:right" | 127
| 215,002720(8)
| 1,55(7)&nbsp;mdtk
| α
| 211Rn
| (9/2+)#
|
|-
| style="text-indent:1em" | 215m1Ra
|
| colspan="3" style="text-indent:2em" | 1877,8(5)&nbsp;keV
| 7,1(2)&nbsp;μdtk
|
|
| (25/2+)
|
|-
| style="text-indent:1em" | 215m2Ra
|
| colspan="3" style="text-indent:2em" | 2246,9(5)&nbsp;keV
| 1,39(7)&nbsp;μdtk
|
|
| (29/2−)
|
|-
| style="text-indent:1em" | 215m3Ra
|
| colspan="3" style="text-indent:2em" | 3756,6(6)+X&nbsp;keV
| 0,555(10)&nbsp;μdtk
|
|
| (43/2−)
|
|-
| rowspan=2|216Ra
| rowspan=2|
| rowspan=2 style="text-align:right" | 88
| rowspan=2 style="text-align:right" | 128
| rowspan=2|216,003533(9)
| rowspan=2|182(10)&nbsp;ndtk
| α
| 212Rn
| rowspan=2|0+
| rowspan=2|
|-
| EC (1%)
| 216Fr
|-
| 217Ra
|
| style="text-align:right" | 88
| style="text-align:right" | 129
| 217,006320(9)
| 1,63(17)&nbsp;μdtk
| α
| 213Rn
| (9/2+)
|
|-
| rowspan=2|218Ra
| rowspan=2|
| rowspan=2 style="text-align:right" | 88
| rowspan=2 style="text-align:right" | 130
| rowspan=2|218,007140(12)
| rowspan=2|25,2(3)&nbsp;μdtk
| α
| 214Rn
| rowspan=2|0+
| rowspan=2|
|-
| β+β+ (langka)
| 218Rn
|-
| 219Ra
|
| style="text-align:right" | 88
| style="text-align:right" | 131
| 219,010085(9)
| 10(3)&nbsp;mdtk
| α
| 215Rn
| (7/2)+
|
|-
| 220Ra
|
| style="text-align:right" | 88
| style="text-align:right" | 132
| 220,011028(10)
| 17,9(14)&nbsp;mdtk
| α
| 216Rn
| 0+
|
|-
| rowspan=2|221Ra
| rowspan=2|
| rowspan=2 style="text-align:right" | 88
| rowspan=2 style="text-align:right" | 133
| rowspan=2|221,013917(5)
| rowspan=2|28(2)&nbsp;dtk
| α
| 217Rn
| rowspan=2|5/2+
| rowspan=2|Renik
|-
| CD (1,2%)
| **<sup>207</sup>Pb**<sup>14</sup>C
|-
| rowspan=2|222Ra
| rowspan=2|
| rowspan=2 style="text-align:right" | 88
| rowspan=2 style="text-align:right" | 134
| rowspan=2|222,015375(5)
| rowspan=2|38,0(5)&nbsp;dtk
| α
| 218Rn
| rowspan=2|0+
| rowspan=2|
|-
| CD (3%)
| **<sup>208</sup>Pb**14C
|-
| rowspan=2|<sup>223</sup>Ra
| rowspan=2|Aktinium X
| rowspan=2 style="text-align:right" | 88
| rowspan=2 style="text-align:right" | 135
| rowspan=2|223,0185022(27)
| rowspan=2|11,43(5)&nbsp;hri
| α
| 219Rn
| rowspan=2|3/2+
| rowspan=2|Renik
|-
| CD (6,4%)
| 209Pb14C
|-
| rowspan=2|224Ra
| rowspan=2|Torium X
| rowspan=2 style="text-align:right" | 88
| rowspan=2 style="text-align:right" | 136
| rowspan=2|224,0202118(24)
| rowspan=2|3,6319(23)&nbsp;hri
| α
| 220Rn
| rowspan=2|0+
| rowspan=2|Renik
|-
| CD (4,3%)
| 210Pb14C
|-
| 225Ra
|
| style="text-align:right" | 88
| style="text-align:right" | 137
| 225,023612(3)
| 14,9(2)&nbsp;hri
| β−
| 225Ac
| 1/2+
| Renik
|-
| rowspan=3|226Ra
| rowspan=3|Radium
| rowspan=3 style="text-align:right" | 88
| rowspan=3 style="text-align:right" | 138
| rowspan=3|226,0254098(25)
| rowspan=3|1600(7)&nbsp;thn
| α
| <sup>222</sup>Rn
| rowspan=3|0+
| rowspan=3|Renik
|-
| β−β− (langka)
| 226Th
|-
| CD (2,6%)
| 212Pb14C
|-
| 227Ra
|
| style="text-align:right" | 88
| style="text-align:right" | 139
| 227,0291778(25)
| 42,2(5)&nbsp;mnt
| β−
| 227Ac
| 3/2+
|
|-
| 228Ra
| Mesotorium 1
| style="text-align:right" | 88
| style="text-align:right" | 140
| 228,0310703(26)
| 5,75(3)&nbsp;thn
| β−
| 228Ac
| 0+
| Renik
|-
| 229Ra
|
| style="text-align:right" | 88
| style="text-align:right" | 141
| 229,034958(20)
| 4,0(2)&nbsp;mnt
| β−
| 229Ac
| 5/2(+)
|
|-
| 230Ra
|
| style="text-align:right" | 88
| style="text-align:right" | 142
| 230,037056(13)
| 93(2)&nbsp;mnt
| β−
| 230Ac
| 0+
|
|-
| 231Ra
|
| style="text-align:right" | 88
| style="text-align:right" | 143
| 231,04122(32)#
| 103(3)&nbsp;dtk
| β−
| 231Ac
| (5/2+)
|
|-
| style="text-indent:1em" | 231mRa
|
| colspan="3" style="text-indent:2em" | 66,21(9)&nbsp;keV
| ~53&nbsp;μdtk
|
|
| (1/2+)
|
|-
| 232Ra
|
| style="text-align:right" | 88
| style="text-align:right" | 144
| 232,04364(30)#
| 250(50)&nbsp;dt
| β−
| 232Ac
| 0+
|
|-
| 233Ra
|
| style="text-align:right" | 88
| style="text-align:right" | 145
| 233,04806(50)#
| 30(5)&nbsp;dtk
| β−
| 233Ac
| 1/2+#
|
|-
| 234Ra
|
| style="text-align:right" | 88
| style="text-align:right" | 146
| 234,05070(53)#
| 30(10)&nbsp;dtk
| β−
| 234Ac
| 0+
|

## Aktinida vs produk fisi

## Referensi

* Massa isotop dari:
**
* Komposisi isotop dan massa atom standar dari:
**
**
* Data waktu paruh, spin, dan isomer dipilih dari sumber-sumber berikut.
**
**
**