Изотопи на радиумот

Радиумот (88Ra) нема стабилни или речиси стабилни изотопи, и затоа не може да се даде стандардна атомска тежина. Најдолговечниот и најчестиот изотоп на радиумот е 226Ra со полуживот од 1600 години. 226Ra се јавува во распадна низа од 238201Ra до 234Ra.

Во раната историја на проучувањето на радиоактивноста, различните природни **изотопи на радиумот** добивале различни имиња, бидејќи концептот на изотопи бил воведен дури во научната кариера на Фредерик Соди во раните 1900-ти. Во оваа шема, Ra бил именуван како актиниум X (AcX), Ra како ториум X (ThX), Ra како радиум (Ra) и Ra како мезоториум 1 (MsTh). Кога се сфати дека сите овие се изотопи на ист елемент, многу од овие имиња испаднале од употреба, а зборот „радиум“ почнал да се однесува на сите изотопи, не само на Ra, иако особено мезоториумот 1 сè уште се користел некое време, со фуснота објаснувајќи дека се однесува на Ra. Некои од производите на распаѓање на радиум-226 добиле историски имиња, вклучително и „радиум“, кои се движат од радиум  до радиум , со буквата што означува приближно колку биле далеку од нивниот родител Ra.

Во 2013 година било откриено дека јадрото на радиум-224 е има крушовиден облик. Ова било првото откритие на асиметрично јадро.

## Список на изотопи

|-id=Радиум-201
| 201Ra
|
| style="text-align:right" | 88
| style="text-align:right" | 113
| 201,012815(22)
| 20(30)&nbsp;ms
| α
| 197Rn
| (3/2−)
|
|-id=Радиум-201m
| style="text-indent:1em" | 201mRa
| 
| colspan="3" style="text-indent:2em" | 263(26)&nbsp;keV
| 6(5)&nbsp;ms
| α
| 197Rn
| 13/2+
|
|-id=Радиум-202
| 202Ra
|
| style="text-align:right" | 88
| style="text-align:right" | 114
| 202,009742(16)
| 4,1(11)&nbsp;ms
| α
| 198Rn
| 0+
|
|-id=Радиум-203
| 203Ra
| 
| style="text-align:right" | 88
| style="text-align:right" | 115
| 203,009234(10)
| 36(13)&nbsp;ms
| α
| 199Rn
| 3/2−
| 
|-id=Радиум-203m
| style="text-indent:1em" | 203mRa
| 
| colspan="3" style="text-indent:2em" | 246(14)&nbsp;keV
| 25(5)&nbsp;ms
| α
| 199Rn
| 13/2+
| 
|-id=Радиум-204
| 204Ra
| 
| style="text-align:right" | 88
| style="text-align:right" | 116
| 204,0065069(96)
| 60(9)&nbsp;ms
| α (99,7%)
| 200Rn
| 0+
| 
|-id=Радиум-205
| 205Ra
| 
| style="text-align:right" | 88
| style="text-align:right" | 117
| 205,006231(24)
| 220(50)&nbsp;ms
| α
| 201Rn
| 3/2−
| 
|-id=Радиум-205m
| style="text-indent:1em" | 205mRa
| 
| colspan="3" style="text-indent:2em" | 263(25)&nbsp;keV
| 180(50)&nbsp;ms
| α
| 201Rn
| 13/2+
| 
|-id=Радиум-206
| 206Ra
|
| style="text-align:right" | 88
| style="text-align:right" | 118
| 206,003828(19)
| 0,24(2)&nbsp;s
| α
| 202Rn
| 0+
|
|-id=Радиум-207
| rowspan=2|207Ra
| rowspan=2|
| rowspan=2 style="text-align:right" | 88
| rowspan=2 style="text-align:right" | 119
| rowspan=2|207,003772(63)
| rowspan=2|1,38(18)&nbsp;s
| α (86%)
| 203Rn
| rowspan=2|5/2−#
| rowspan=2|
|-
| β<sup>+</sup> (14%)
| 207Fr
|-id=Радиум-207m
| rowspan=2 style="text-indent:1em" | 207mRa
| rowspan=2|
| rowspan=2 colspan="3" style="text-indent:2em" | 560(60)&nbsp;keV
| rowspan=2|57(8)&nbsp;ms
| IT (85#%)
| 207Ra
| rowspan=2|13/2+
| rowspan=2|
|-
| α (?%)
| 203Rn
|-id=Радиум-208
| rowspan=2|208Ra
| rowspan=2|
| rowspan=2 style="text-align:right" | 88
| rowspan=2 style="text-align:right" | 120
| rowspan=2|208,0018550(97)
| rowspan=2|1,110(45)&nbsp;s
| α (87%)
| 204Rn
| rowspan=2|0+
| rowspan=2|
|-
| β+ (13%)
| 208Fr
|-id=Радиум-208m
| style="text-indent:1em" | 208mRa
|
| colspan="3" style="text-indent:2em" | 2147,4(4)&nbsp;keV
| 263(17)&nbsp;ns
| IT
| 208Ra
| (8+)
|
|-id=Радиум-209
| 209Ra
| 
| style="text-align:right" | 88
| style="text-align:right" | 121
| 209,0019949(62)
| 4,71(8)&nbsp;s
| α (90%)
| 205Rn
| 5/2−
| 
|-id=Радиум-209m
| rowspan=2 style="text-indent:1em" | 209mRa
| rowspan=2|
| rowspan=2 colspan="3" style="text-indent:2em" | 882,4(7)&nbsp;keV
| rowspan=2|117(5)&nbsp;μs
| α (90%)
| 205Rn
| rowspan=2|13/2+
| rowspan=2|
|-
| β+ (10%)
| 209Fr
|-id=Радиум-210
| 210Ra
| 
| style="text-align:right" | 88
| style="text-align:right" | 122
| 210,0004754(99)
| 4,0(1)&nbsp;s
| α
| 206Rn
| 0+
| 
|-id=Радиум-210m
| style="text-indent:1em" | 210mRa
|
| colspan="3" style="text-indent:2em" | 2050,9(7)&nbsp;keV
| 2,29(3)&nbsp;μs
| IT
| 210Ra
| 8+
|
|-id=Радиум-211
| 211Ra
| 
| style="text-align:right" | 88
| style="text-align:right" | 123
| 211,0008930(53)
| 12,6(12)&nbsp;s
| α
| 207Rn
| 5/2−
| 
|-id=Радиум-211m
| style="text-indent:1em" | 211mRa
|
| colspan="3" style="text-indent:2em" | 1198,1(8)&nbsp;keV
| 9,5(3)&nbsp;μs
| IT
| 211Ra
| 13/2+
|
|-id=Радиум-212
| rowspan=2|212Ra
| rowspan=2|
| rowspan=2 style="text-align:right" | 88
| rowspan=2 style="text-align:right" | 124
| rowspan=2|211,999787(11)
| rowspan=2|13,0(2)&nbsp;s
| α (?%)
| 208Rn
| rowspan=2|0+
| rowspan=2|
|-
| β+ (?%)
| 212Fr
|-id=Радиум-212m1
| style="text-indent:1em" | 212m1Ra
|
| colspan="3" style="text-indent:2em" | 1958,4(20)&nbsp;keV
| 9,3(9)&nbsp;μs
| IT
| 212Ra
| 8+
|
|-id=Радиум-212m2
| style="text-indent:1em" | 212m2Ra
|
| colspan="3" style="text-indent:2em" | 2613,3(20)&nbsp;keV
| 0,85(13)&nbsp;μs
| IT
| 212Ra
| 11−
|
|-id=Радиум-213
| rowspan=2|213Ra
| rowspan=2|
| rowspan=2 style="text-align:right" | 88
| rowspan=2 style="text-align:right" | 125
| rowspan=2|213,000371(11)
| rowspan=2|2,73(5)&nbsp;min
| α (87%)
| 209Rn
| rowspan=2|1/2−
| rowspan=2|
|-
| β+ (13%)
| 213Fr
|-id=Радиум-213m
| rowspan=2 style="text-indent:1em" | 213mRa
| rowspan=2|
| rowspan=2 colspan="3" style="text-indent:2em" | 1768(4)&nbsp;keV
| rowspan=2|2,20(5)&nbsp;ms
| IT (99,4%)
| 213Ra
| rowspan=2|(17/2−)
| rowspan=2|
|-
| α (0,6%)
| 209Rn
|-id=Радиум-214
| rowspan=2|214Ra
| rowspan=2|
| rowspan=2 style="text-align:right" | 88
| rowspan=2 style="text-align:right" | 126
| rowspan=2|214,0000996(56)
| rowspan=2|2,437(16)&nbsp;s
| α (99,94%)
| 210Rn
| rowspan=2|0+
| rowspan=2|
|-
| β+ (0,059%)
| 214Fr
|-id=Радиум-214m1
| style="text-indent:1em" | 214m1Ra
|
| colspan="3" style="text-indent:2em" | 1819,7(18)&nbsp;keV
| 118(7)&nbsp;ns
| IT
| 214Ra
| 6+
|
|-id=Радиум-214m2
| rowspan=2 style="text-indent:1em" | 214m2Ra
| rowspan=2|
| rowspan=2 colspan="3" style="text-indent:2em" | 1865,2(18)&nbsp;keV
| rowspan=2|67,3(15)&nbsp;μs
| IT (99,91%)
| 214Ra
| rowspan=2|8+
| rowspan=2|
|-
| α (0,09%)
| 210Rn
|-id=Радиум-214m3
| style="text-indent:1em" | 214m3Ra
|
| colspan="3" style="text-indent:2em" | 2683,2(18)&nbsp;keV
| 295(7)&nbsp;ns
| IT
| 214Ra
| 11−
|
|-id=Радиум-214m4
| style="text-indent:1em" | 214m4Ra
|
| colspan="3" style="text-indent:2em" | 3478,4(18)&nbsp;keV
| 279(4)&nbsp;ns
| IT
| 214Ra
| 14+
|
|-id=Радиум-214m5
| style="text-indent:1em" | 214m5Ra
|
| colspan="3" style="text-indent:2em" | 4146,8(18)&nbsp;keV
| 225(4)&nbsp;ns
| IT
| 214Ra
| 17−
|
|-id=Радиум-214m6
| style="text-indent:1em" | 214m6Ra
|
| colspan="3" style="text-indent:2em" | 6577,0(18)&nbsp;keV
| 128(4)&nbsp;ns
| IT
| 214Ra
| (25−)
|
|-id=Радиум-215
| 215Ra
|
| style="text-align:right" | 88
| style="text-align:right" | 127
| 215,0027182(77)
| 1,669(9)&nbsp;ms
| α
| 211Rn
| 9/2+#
|
|-id=Радиум-215m1
| style="text-indent:1em" | 215m1Ra
|
| colspan="3" style="text-indent:2em" | 1877,8(3)&nbsp;keV
| 7,31(13)&nbsp;μs
| IT
| 215Ra
| (25/2+)
|
|-id=Радиум-215m2
| style="text-indent:1em" | 215m2Ra
|
| colspan="3" style="text-indent:2em" | 2246,9(4)&nbsp;keV
| 1,39(7)&nbsp;μs
| IT
| 215Ra
| (29/2−)
|
|-id=Радиум-215m3
| style="text-indent:1em" | 215m3Ra
|
| colspan="3" style="text-indent:2em" | 3807(50)#&nbsp;keV
| 555(10)&nbsp;ns
| IT
| 215Ra
| (43/2−)
|
|-id=Радиум-216
| rowspan=2|216Ra
| rowspan=2|
| rowspan=2 style="text-align:right" | 88
| rowspan=2 style="text-align:right" | 128
| rowspan=2|216,0035335(86)
| rowspan=2|172(7)&nbsp;ns
| α
| 212Rn
| rowspan=2|0+
| rowspan=2|
|-
| EC (−8%)
| 216Fr
|-id=Радиум-217
| 217Ra
|
| style="text-align:right" | 88
| style="text-align:right" | 129
| 217,0063227(76)
| 1,95(12)&nbsp;μs
| α
| 213Rn
| (9/2+)
|
|-id=Радиум-218
|218Ra
|
| style="text-align:right" | 88
| style="text-align:right" | 130
| 218,007134(11)
| 25,91(14)&nbsp;μs
| α
| 214Rn
| 0+
|
|-id=Радиум-219
| 219Ra
|
| style="text-align:right" | 88
| style="text-align:right" | 131
| 219,0100847(73)
| 9(2)&nbsp;ms
| α
| 215Rn
| (7/2)+
|
|-id=Радиум-219m
| style="text-indent:1em" | 219mRa
|
| colspan="3" style="text-indent:2em" | 16,7(8)&nbsp;keV
| 10(3)&nbsp;ns
| α
| 215Rn
| (11/2)+
|
|-id=Радиум-220
| 220Ra
|
| style="text-align:right" | 88
| style="text-align:right" | 132
| 220,0110275(82)
| 18,1(12)&nbsp;ms
| α
| 216Rn
| 0+
|
|-id=Радиум-221
| rowspan=2|221Ra
| rowspan=2|
| rowspan=2 style="text-align:right" | 88
| rowspan=2 style="text-align:right" | 133
| rowspan=2|221,0139173(05)
| rowspan=2|25(4)&nbsp;s
| α
| 217Rn
| rowspan=2|5/2+
| rowspan=2|Траги
|-
| CD (1,2×10−10%)
| **<sup>207</sup>Pb**<sup>14</sup>C
|-id=Радиум-222
| rowspan=2|222Ra
| rowspan=2|
| rowspan=2 style="text-align:right" | 88
| rowspan=2 style="text-align:right" | 134
| rowspan=2|222,0153734(48)
| rowspan=2|33,6(4)&nbsp;s
| α
| 218Rn
| rowspan=2|0+
| rowspan=2|
|-
| CD (3,0×10−8%)
| **<sup>208</sup>Pb**14C
|-
| rowspan=2|<sup>223</sup>Ra
| rowspan=2|Актиниум X
| rowspan=2 style="text-align:right" | 88
| rowspan=2 style="text-align:right" | 135
| rowspan=2|223,0185006(22)
| rowspan=2|11,4352(10)&nbsp;d
| α
| 219Rn
| rowspan=2|3/2+
| rowspan=2|Траги
|-
| CD (8,9×10−8%)
| 209Pb14C
|-id=Радиум-224
| rowspan=2|224Ra
| rowspan=2|Ториум X
| rowspan=2 style="text-align:right" | 88
| rowspan=2 style="text-align:right" | 136
| rowspan=2|224,0202104(19)
| rowspan=2|3,6316(14)&nbsp;d
| α
| 220Rn
| rowspan=2|0+
| rowspan=2|Траги
|-
| CD (4,0×10−9%)
| 210Pb14C
|-id=Радиум-225
| rowspan=2|225Ra
| rowspan=2|
| rowspan=2 style="text-align:right" | 88
| rowspan=2 style="text-align:right" | 137
| rowspan=2|225,0236105(28)
| rowspan=2|14,82(19)&nbsp;d
| β−
| 225Ac
| rowspan=2|1/2+
| rowspan=2|Траги
|-
|α (2,6×10−3%)
|221Rn
|-
| rowspan=2|<sup>226</sup>Ra
| rowspan=2|Радиум
| rowspan=2 style="text-align:right" | 88
| rowspan=2 style="text-align:right" | 138
| rowspan=2|226,0254082(21)
| rowspan=2|1600(7)&nbsp;y
| α
| <sup>222</sup>Rn
| rowspan=2|0+
| rowspan=2|Траги
|-
| CD (2,6×10−9%)
| 212Pb14C
|-id=Радиум-227
| 227Ra
|
| style="text-align:right" | 88
| style="text-align:right" | 139
| 227,0291762(21)
| 42,2(5)&nbsp;min
| β−
| 227Ac
| 3/2+
|
|-id=Радиум-228
| 228Ra
| Мезоториум 1
| style="text-align:right" | 88
| style="text-align:right" | 140
| 228,0310686(21)
| 5,75(3)&nbsp;y
| β−
| 228Ac
| 0+
| Траги
|-id=Радиум-229
| 229Ra
|
| style="text-align:right" | 88
| style="text-align:right" | 141
| 229,034957(17)
| 4,0(2)&nbsp;min
| β−
| 229Ac
| 5/2+
|
|-id=Радиум-230
| 230Ra
|
| style="text-align:right" | 88
| style="text-align:right" | 142
| 230,037055(11)
| 93(2)&nbsp;min
| β−
| 230Ac
| 0+
|
|-id=Радиум-231
| 231Ra
|
| style="text-align:right" | 88
| style="text-align:right" | 143
| 231,041027(12)
| 104(1)&nbsp;s
| β−
| 231Ac
| (5/2+)
|
|-id=Радиум-231m
| style="text-indent:1em" | 231mRa
|
| colspan="3" style="text-indent:2em" | 66,21(9)&nbsp;keV
| ~53&nbsp;μs
| IT
| 231Ra
| (1/2+)
|
|-id=Радиум-232
| 232Ra
|
| style="text-align:right" | 88
| style="text-align:right" | 144
| 232,0434753(98)
| 4,0(3)&nbsp;min
| β−
| 232Ac
| 0+
|
|-id=Радиум-233
| 233Ra
|
| style="text-align:right" | 88
| style="text-align:right" | 145
| 233,0475946(92)
| 30(5)&nbsp;s
| β−
| 233Ac
| 1/2+#
|
|-id=Радиум-234
| 234Ra
|
| style="text-align:right" | 88
| style="text-align:right" | 146
| 234,0503821(90)
| 30(10)&nbsp;s
| β−
| 234Ac
| 0+
|

## Актиниди наспроти фисиони производи

## Белешки


## Наводи

Радиум
Категорија:Радиум
Категорија:Изотопи на радиумот