멘델레븀 동위 원소
표

| 핵종 기호 | Z(p)> 들뜬 에너지 | N(n)> 들뜬 에너지 |   동위 원소 질량 (u)  > 들뜬 에너지 | 반감기 | 붕괴 방식 | 붕괴 생성물 | 핵 스핀 |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 245Md | 101 | 144 | 245.08081(33)# | 0.90(25) ms | SF | 다양 | (1/2-)# |
| 245Md | 101 | 144 | 245.08081(33)# | 0.90(25) ms | α (드묾) | 241Es | (1/2-)# |
| 245mMd | 200(100)# keV | 200(100)# keV | 200(100)# keV | 400(200) ms [0.35(+23-16) s] | α | 241Es | (7/2+) |
| 245mMd | 200(100)# keV | 200(100)# keV | 200(100)# keV | 400(200) ms [0.35(+23-16) s] | β+ (드묾) | 245Fm | (7/2+) |
| 246Md | 101 | 145 | 246.08171(28)# | 1.0(4) s | α | 242Es |  |
| 246Md | 101 | 145 | 246.08171(28)# | 1.0(4) s | β+ (드묾) | 246Fm |  |
| 247Md | 101 | 146 | 247.08152(22)# | 1.12(22) s | SF | 다양 | 1/2-# |
| 247Md | 101 | 146 | 247.08152(22)# | 1.12(22) s | α (드묾) | 243Es | 1/2-# |
| 247mMd |  |  |  | ~0.2 s | α (99.99%) | 243Es |  |
| 247mMd |  |  |  | ~0.2 s | SF (10−4%) | 다양 |  |
| 248Md | 101 | 147 | 248.08282(26)# | 7(3) s | β+ (80%) | 248Fm |  |
| 248Md | 101 | 147 | 248.08282(26)# | 7(3) s | α (20%) | 244Es |  |
| 248Md | 101 | 147 | 248.08282(26)# | 7(3) s | β+, SF (0.05%) | 다양 |  |
| 249Md | 101 | 148 | 249.08291(22)# | 24(4) s | α (60%) | 245Es | (7/2-) |
| 249Md | 101 | 148 | 249.08291(22)# | 24(4) s | β+ (40%) | 249Fm | (7/2-) |
| 249mMd | 100(100)# keV | 100(100)# keV | 100(100)# keV | 1.9(9) s |  |  | (1/2-) |
| 250Md | 101 | 149 | 250.08442(32)# | 52(6) s | β+ (93%) | 250Fm |  |
| 250Md | 101 | 149 | 250.08442(32)# | 52(6) s | α (7%) | 246Es |  |
| 250Md | 101 | 149 | 250.08442(32)# | 52(6) s | β+, SF (0.02%) | 다양 |  |
| 251Md | 101 | 150 | 251.084774(20) | 4.0(5) min | β+ (90%) | 251Fm | 7/2-# |
| 251Md | 101 | 150 | 251.084774(20) | 4.0(5) min | α (10%) | 247Es | 7/2-# |
| 252Md | 101 | 151 | 252.08643(14)# | 2.3(8) min | β+ (50%) | 252Fm |  |
| 252Md | 101 | 151 | 252.08643(14)# | 2.3(8) min | α (50%) | 248Es |  |
| 253Md | 101 | 152 | 253.08714(3)# | 12(8) min [6(+12-3) min] | β+ | 253Fm | 7/2-# |
| 253Md | 101 | 152 | 253.08714(3)# | 12(8) min [6(+12-3) min] | α | 249Es | 7/2-# |
| 254Md | 101 | 153 | 254.08959(11)# | 10(3) min | β+ | 254Fm | (0-) |
| 254Md | 101 | 153 | 254.08959(11)# | 10(3) min | α (드묾) | 250Es | (0-) |
| 254mMd | 50(100)# keV | 50(100)# keV | 50(100)# keV | 28(8) min | β+ | 254Fm | (3-) |
| 254mMd | 50(100)# keV | 50(100)# keV | 50(100)# keV | 28(8) min | α (드묾) | 250Es | (3-) |
| 255Md | 101 | 154 | 255.091084(7) | 27(2) min | β+ (92%) | 255Fm | (7/2-) |
| 255Md | 101 | 154 | 255.091084(7) | 27(2) min | α (8%) | 251Es | (7/2-) |
| 255Md | 101 | 154 | 255.091084(7) | 27(2) min | SF (0.15%) | 다양 | (7/2-) |
| 256Md | 101 | 155 | 256.09389(13)# | 77(2) min | β+ (89%) | 256Fm | (1-) |
| 256Md | 101 | 155 | 256.09389(13)# | 77(2) min | α (11%) | 252Es | (1-) |
| 257Md | 101 | 156 | 257.0955424(29) | 5.52(5) h | ε (84.8%) | 257Fm | (7/2-) |
| 257Md | 101 | 156 | 257.0955424(29) | 5.52(5) h | α (15.2%) | 253Es | (7/2-) |
| 257Md | 101 | 156 | 257.0955424(29) | 5.52(5) h | SF (1%) | 다양 | (7/2-) |
| 258Md | 101 | 157 | 258.098431(5) | 51.5(3) d | α (99.99%) | 254Es | (8-)# |
| 258Md | 101 | 157 | 258.098431(5) | 51.5(3) d | β- (0.0015%) | 258No | (8-)# |
| 258Md | 101 | 157 | 258.098431(5) | 51.5(3) d | β+ (0.0015%) | 258Fm | (8-)# |
| 258mMd | 0(200)# keV | 0(200)# keV | 0(200)# keV | 57.0(9) min | ε (70%) | 258Fm | 1-# |
| 258mMd | 0(200)# keV | 0(200)# keV | 0(200)# keV | 57.0(9) min | SF (20%) | 다양 | 1-# |
| 258mMd | 0(200)# keV | 0(200)# keV | 0(200)# keV | 57.0(9) min | β- (10%) | 258No | 1-# |
| 258mMd | 0(200)# keV | 0(200)# keV | 0(200)# keV | 57.0(9) min | α (1.2%) | 254Es | 1-# |
| 259Md | 101 | 158 | 259.10051(22)# | 1.60(6) h | SF (98.7%) | 다양 | 7/2-# |
| 259Md | 101 | 158 | 259.10051(22)# | 1.60(6) h | α (1.3%) | 255Es | 7/2-# |
| 260Md | 101 | 159 | 260.10365(34)# | 27.8(8) d | SF (85%) | 다양 |  |
| 260Md | 101 | 159 | 260.10365(34)# | 27.8(8) d | α (5%) | 256Es |  |
| 260Md | 101 | 159 | 260.10365(34)# | 27.8(8) d | ε (5%) | 260Fm |  |
| 260Md | 101 | 159 | 260.10365(34)# | 27.8(8) d | β- (3.5%) | 260No |  |
| 261Md | 101 | 160 | 261.10583(62)# | 40# min | α | 257Es | 7/2-# |
| 262Md | 101 | 161 | 262.10910(45)# | 3# min | SF | 다양 |  |