Природно настанатиот родиум (45Rh) има само еден стабилен изотоп, 103Rh. Најстабилни радиоизотопи се 101Rh со време на полураспад од 3,3 години, 102Rh со време на полураспад од 207 дена и 99Rh со време на полураспад од 16,1 дена. Триесет други радиоизотопи се одликуваат со атомска тежина која се движи од 88,949 u (89Rh) до 121.943 u (122Rh). Повеќето од нив имаат време на полураспад помало од еден час, освен 100Rh (време на полураспад: 20,8 часа) и 105Rh (време на полураспад: 35,36 часа). Исто така, постојат бројни мета состојби со најстабилен 102mRh (0,141 MeV) со време на полураспад од околу 3,7 години и 101mRh (0,157 MeV) со време на полураспад од 4,34 дена.
Примарниот режим на распаѓање пред единствениот стабилен изотоп, 103Rh, е електронскиот зафат, а примарниот режим после е бета емисија. Примарниот распаден производ пред 103Rh е рутениум, а примарниот производ после е паладиум.
Список на изотопи
|-id=Родиум-90 | rowspan=2|90Rh | rowspan=2 style="text-align:right" | 45 | rowspan=2 style="text-align:right" | 45 | rowspan=2|89,94457(22)# | rowspan=2|29(3) ms | β+ | 90Ru | rowspan=2|(0+) | rowspan=2| |- | β+, p? (<0,7%) | 89Tc |-id=Родиум-90m | rowspan=2 style="text-indent:1em" | 90mRh Редоследот на основната состојба и изомерот е неизвесен. | rowspan=2 colspan="3" style="text-indent:2em" | 0(500)# keV | rowspan=2|0,56(2) s | β+ (90,4%) | 90Ru | rowspan=2|(7+) | rowspan=2| |- | β+, p (9,6%) | 89Tc |-id=Родиум-91 | rowspan=2|91Rh | rowspan=2 style="text-align:right" | 45 | rowspan=2 style="text-align:right" | 46 | rowspan=2|90,93712(32)# | rowspan=2|1,47(22) s | β+ (98,7%) | 91Ru | rowspan=2|(9/2+) | rowspan=2| |- | β+, p (1,3%) | 90Tc |-id=Родиум-91m | rowspan=3 style="text-indent:1em" | 91mRh | rowspan=3 colspan="3" style="text-indent:2em" | 172,9(4) keV | rowspan=3|1,8# s | β+? | 91Ru | rowspan=3|1/2−# | rowspan=3| |- | β+, p? | 90Tc |- | IT? | 91Rh |-id=Родиум-92 | rowspan=2|92Rh | rowspan=2 style="text-align:right" | 45 | rowspan=2 style="text-align:right" | 47 | rowspan=2|91,9323677(47) | rowspan=2|5,61(8) s | β+ (97,95%) | 92Ru | rowspan=2|(6+) | rowspan=2| |- | β+, p (2,05%) | 91Tc |-id=Родиум-92m1 | rowspan=2 style="text-indent:1em" | 92m1Rh | rowspan=2 colspan="3" style="text-indent:2em" | 50(100)# keV | rowspan=2|3,18(22) s | β+ (98,3%) | 92Ru | rowspan=2|(2+) | rowspan=2| |- | β+, p (1,7%) | 91Tc |-id=Родиум-92m2 | style="text-indent:1em" | 92m2Rh | colspan="3" style="text-indent:2em" | 105(100)# keV | 232(15) ns | IT | 92Rh | (4+) | |-id=Родиум-93 | 93Rh | style="text-align:right" | 45 | style="text-align:right" | 48 | 92,9259128(28) | 13,9(16) s | β+ | 93Ru | 9/2+# | |-id=Родиум-94 | rowspan=2|94Rh | rowspan=2 style="text-align:right" | 45 | rowspan=2 style="text-align:right" | 49 | rowspan=2|93,9217305(36) | rowspan=2|70,6(6) s | β+ (98,2%) | 94Ru | rowspan=2|(4+) | rowspan=2| |- | β+, p (1,8%) | 93Tc |-id=Родиум-94m1 | style="text-indent:1em" | 94m1Rh | colspan="3" style="text-indent:2em" | 54,60(20)# keV | 480(30) ns | IT | 94Rh | (2+) | |-id=Родиум-94m2 | style="text-indent:1em" | 94m2Rh | colspan="3" style="text-indent:2em" | 300(200)# keV | 25,8(2) s | β+ | 94Ru | (8+) | |-id=Родиум-95 | 95Rh | style="text-align:right" | 45 | style="text-align:right" | 50 | 94,9158979(42) | 5,02(10) min | β+ | 95Ru | (9/2)+ | |-id=Родиум-95m | rowspan=2 style="text-indent:1em" | 95mRh | rowspan=2 colspan="3" style="text-indent:2em" | 543,3(3) keV | rowspan=2|1,96(4) min | IT (88%) | 95Rh | rowspan=2|(1/2)− | rowspan=2| |- | β+ (12%) | 95Ru |-id=Родиум-96 | 96Rh | style="text-align:right" | 45 | style="text-align:right" | 51 | 95 914452(11) | 9,90(10) min | β+ | 96Ru | 6+ | |-id=Родиум-96m | rowspan=2 style="text-indent:1em" | 96mRh | rowspan=2 colspan="3" style="text-indent:2em" | 51,98(9) keV | rowspan=2|1,51(2) min | IT (60%) | 96Rh | rowspan=2|3+ | rowspan=2| |- | β+ (40%) | 96Ru |-id=Родиум-97 | 97Rh | style="text-align:right" | 45 | style="text-align:right" | 52 | 96,911328(38) | 30,7(6) min | β+ | 97Ru | 9/2+ | |-id=Родиум-97m | rowspan=2 style="text-indent:1em" | 97mRh | rowspan=2 colspan="3" style="text-indent:2em" | 258,76(18) keV | rowspan=2|46,2(16) min | β+ (94,4%) | 97Ru | rowspan=2|1/2− | rowspan=2| |- | IT (5,6%) | 97Rh |-id=Родиум-98 | 98Rh | style="text-align:right" | 45 | style="text-align:right" | 53 | 97,910708(13) | 8,72(12) min | β+ | 98Ru | (2)+ | |-id=Родиум-98m | rowspan=2 style="text-indent:1em" | 98mRh | rowspan=2 colspan="3" style="text-indent:2em" | 56,3(10) keV | rowspan=2|3,6(2) min | IT (89%) | 98Rh | rowspan=2|(5+) | rowspan=2| |- | β+ (11%) | 98Ru |-id=Родиум-99 | 99Rh | style="text-align:right" | 45 | style="text-align:right" | 54 | 98,908121(21) | 16,1(2) d | β+ | 99Ru | 1/2− | |-id=Родиум-99m | rowspan=2 style="text-indent:1em" | 99mRh | rowspan=2 colspan="3" style="text-indent:2em" | 64,4(5) keV | rowspan=2|4,7(1) h | β+ | 99Ru | rowspan=2|9/2+ | rowspan=2| |- | IT? | 99Rh |-id=Родиум-100 | rowspan=2|100Rh | rowspan=2 style="text-align:right" | 45 | rowspan=2 style="text-align:right" | 55 | rowspan=2|99,908114(19) | rowspan=2|20,8(1) h | EC (95,1%) | 100Ru | rowspan=2|1− | rowspan=2| |- | β+ (4,9%) | 100Ru |-id=Родиум-100m1 | style="text-indent:1em" | 100m1Rh | colspan="3" style="text-indent:2em" | 74,782(14) keV | 214,0(20) ns | IT | 100Rh | (2)+ | |-id=Родиум-100m2 | rowspan=2 style="text-indent:1em" | 100m2Rh | rowspan=2 colspan="3" style="text-indent:2em" | 107,6(2) keV | rowspan=2|4,6(2) min | IT (98,3%) | 100Rh | rowspan=2|(5+) | rowspan=2| |- | β+ (1,7%) | 100Ru |-id=Родиум-100m3 | style="text-indent:1em" | 100m3Rh | colspan="3" style="text-indent:2em" | 219,61(22) keV | 130(10) ns | IT | 100Rh | (7+) | |-id=Родиум-101 | 101Rh | style="text-align:right" | 45 | style="text-align:right" | 56 | 100,9061589(63) | 4,07(5) y | EC | 101Ru | 1/2− | |-id=Родиум-101m | rowspan=2 style="text-indent:1em" | 101mRh | rowspan=2 colspan="3" style="text-indent:2em" | 157,32(3) keV | rowspan=2|4,343(10) d | EC (92,80%) | 101Ru | rowspan=2|9/2+ | rowspan=2| |- | IT (7,20%) | 101Rh |-id=Родиум-102 | rowspan=2|102Rh | rowspan=2 style="text-align:right" | 45 | rowspan=2 style="text-align:right" | 57 | rowspan=2|101,9068343(69) | rowspan=2|207,0(15) d | β+ (78%) | 102Ru | rowspan=2|2− | rowspan=2| |- | β− (22%) | 102Pd |-id=Родиум-102m | rowspan=2 style="text-indent:1em" | 102mRh | rowspan=2 colspan="3" style="text-indent:2em" | 140,73(9) keV | rowspan=2|3,742(10) y | β+ (99,77%) | 102Ru | rowspan=2|6+ | rowspan=2| |- | IT (0,233%) | 102Rh |-id=Родиум-103 | 103RhЈадрен фисионен производ | style="text-align:right" | 45 | style="text-align:right" | 58 | 102,9054941(25) | colspan=3 align=center|Stable | 1/2− | 1,0000 |-id=Родиум-103m | style="text-indent:1em" | 103mRh | colspan="3" style="text-indent:2em" | 39,753(6) keV | 56,114(9) min | IT | 103Rh | 7/2+ | |-id=Родиум-104 | rowspan=2|104Rh | rowspan=2 style="text-align:right" | 45 | rowspan=2 style="text-align:right" | 59 | rowspan=2|103,9066453(25) | rowspan=2|42,3(4) s | β− (99,55%) | 104Pd | rowspan=2|1+ | rowspan=2| |- | β+ (0,45%) | 104Ru |-id=Родиум-104m | rowspan=2 style="text-indent:1em" | 104mRh | rowspan=2 colspan="3" style="text-indent:2em" | 128,9679(5) keV | rowspan=2|4,34(3) min | IT (99,87%) | 104Rh | rowspan=2|5+ | rowspan=2| |- | β− (0,13%) | 104Pd |-id=Родиум-105 | 105Rh | style="text-align:right" | 45 | style="text-align:right" | 60 | 104,9056878(27) | 35,341(19) h | β− | 105Pd | 7/2+ | |-id=Родиум-105m | style="text-indent:1em" | 105mRh | colspan="3" style="text-indent:2em" | 129,742(4) keV | 42,8(3) s | IT | 105Rh | 1/2− | |-id=Родиум-106 | 106Rh | style="text-align:right" | 45 | style="text-align:right" | 61 | 105,9072859(58) | 30,07(35) s | β− | 106Pd | 1+ | |-id=Родиум-106m | style="text-indent:1em" | 106mRh | colspan="3" style="text-indent:2em" | 132(11) keV | 131(2) min | β− | 106Pd | (6)+ | |-id=Родиум-107 | 107Rh | style="text-align:right" | 45 | style="text-align:right" | 62 | 106,906748(13) | 21,7(4) min | β− | 107Pd | 7/2+ |-id=Родиум-107m | style="text-indent:1em" | 107mRh | colspan="3" style="text-indent:2em" | 268,36(4) keV | >10 μs | IT | 107Rh | 1/2− | |-id=Родиум-108 | 108Rh | style="text-align:right" | 45 | style="text-align:right" | 63 | 107,908715(15) | 16,8(5) s | β− | 108Pd | 1+ | |-id=Родиум-108m | style="text-indent:1em" | 108mRh | colspan="3" style="text-indent:2em" | 115(18) keV | 6,0(3) min | β− | 108Pd | (5+) | |-id=Родиум-109 | 109Rh | style="text-align:right" | 45 | style="text-align:right" | 64 | 108,9087496(43) | 80,8(7) s | β− | 109Pd | 7/2+ | |-id=Родиум-109m | style="text-indent:1em" | 109mRh | colspan="3" style="text-indent:2em" | 225,873(19) keV | 1,66(4) μs | IT | 109Pd | 3/2+ | |-id=Родиум-110 | 110Rh | style="text-align:right" | 45 | style="text-align:right" | 65 | 109,911080(19) | 3,35(12) s | β− | 110Pd | (1+) | |-id=Родиум-110m | style="text-indent:1em" | 110mRh | colspan="3" style="text-indent:2em" | 220(150)# keV | 28,5(13) s | β− | 110Pd | (6+) | |-id=Родиум-111 | 111Rh | style="text-align:right" | 45 | style="text-align:right" | 66 | 110,9116432(74) | 11(1) s | β− | 111Pd | (7/2+) | |-id=Родиум-112 | 112Rh | style="text-align:right" | 45 | style="text-align:right" | 67 | 111,914405(47) | 3,4(4) s | β− | 112Pd | (1+) | |-id=Родиум-112m | style="text-indent:1em" | 112mRh | colspan="3" style="text-indent:2em" | 340(70) keV | 6,73(15) s | β− | 112Pd | (6+) | |-id=Родиум-113 | 113Rh | style="text-align:right" | 45 | style="text-align:right" | 68 | 112,9154402(77) | 2,80(12) s | β− | 113Pd | (7/2+) | |-id=Родиум-114 | 114Rh | style="text-align:right" | 45 | style="text-align:right" | 69 | 113,918722(77) | 1,85(5) s | β− | 114Pd | 1+ | |-id=Родиум-114m | style="text-indent:1em" | 114mRh | colspan="3" style="text-indent:2em" | 200(150)# keV | 1,85(5) s | β− | 114Pd | (7−) | |-id=Родиум-115 | rowspan=2|115Rh | rowspan=2 style="text-align:right" | 45 | rowspan=2 style="text-align:right" | 70 | rowspan=2|114,9203116(79) | rowspan=2|1,03(3) s | β− | 115Pd | rowspan=2|(7/2+) | rowspan=2| |- | β−, n? | 114Pd |-id=Родиум-116 | rowspan=2|116Rh | rowspan=2 style="text-align:right" | 45 | rowspan=2 style="text-align:right" | 71 | rowspan=2|115,924062(79) | rowspan=2|685(39) ms | β− (>97,9%) | 116Pd | rowspan=2|1+ | rowspan=2| |- | β−, n? (<2,1%) | 115Pd |-id=Родиум-116m | rowspan=2 style="text-indent:1em" | 116mRh | rowspan=2 colspan="3" style="text-indent:2em" | 200(150)# keV | rowspan=2|570(50) ms | β− (>97,9%) | 116Pd | rowspan=2|(6−) | rowspan=2| |- | β−, n? (<2,1%) | 115Pd |-id=Родиум-117 | rowspan=2|117Rh | rowspan=2 style="text-align:right" | 45 | rowspan=2 style="text-align:right" | 72 | rowspan=2|116,9260363(95) | rowspan=2|421(30) ms | β− | 117Pd | rowspan=2|7/2+# | rowspan=2| |- | β−, n? (<7,6%) | 115Pd |-id=Родиум-117m | style="text-indent:1em" | 117mRh | colspan="3" style="text-indent:2em" | 321,2(10) keV | 138(17) ns | IT | 117Rh | 3/2+# | |-id=Родиум-118 | rowspan=2|118Rh | rowspan=2 style="text-align:right" | 45 | rowspan=2 style="text-align:right" | 73 | rowspan=2|117,930341(26) | rowspan=2|282(9) ms | β− (96,9%) | 118Pd | rowspan=2|1+# | rowspan=2| |- | β−, n (3,1%) | 117Pd |-id=Родиум-118m | rowspan=3 style="text-indent:1em" | 118mRh | rowspan=3 colspan="3" style="text-indent:2em" | 200(150)# keV | rowspan=3|310(30) ms | β− (96,9%) | 118Pd | rowspan=3|6−# | rowspan=3| |- | β−, n (3,1%) | 117Pd |- | IT? | 118Rh |-id=Родиум-119 | rowspan=2|119Rh | rowspan=2 style="text-align:right" | 45 | rowspan=2 style="text-align:right" | 74 | rowspan=2|118,932557(10) | rowspan=2|190(6) ms | β− (93,6%) | 119Pd | rowspan=2|7/2+# | rowspan=2| |- | β−, n (6,4%) | 118Pd |-id=Родиум-120 | rowspan=3| 120Rh | rowspan=3 style="text-align:right" | 45 | rowspan=3 style="text-align:right" | 75 | rowspan=3| 119,93707(22)# | rowspan=3| 129,6(42) ms | β− | 120Pd | rowspan=3| 8−# | rowspan=3| |- | β−, n (<9,3%) | 119Pd |- | β−, 2n? | 118Pd |-id=Родиум-120m | style="text-indent:1em" | 120mRh | colspan="3" style="text-indent:2em" | 157,2(7) keV