Db
Dubnium
Z 105 268.0 g/molTransition Metal Radioactive
| 255Db | 150 | 255.1069 | 99,600.0 | --- | 54.0 ms | (9/2+) | SF(67%) α→251Lr | 1976 |
| 255mDb | 150 | 255.107 | 99,700.0 | --- | 2.8 ms | (1/2-) | SF(100%) α→251Lr | 1976 |
| 256Db | 151 | 256.1077 | 100,300.0 | --- | 1.7 s | (9-) | α→252Lr(70%) β⁺→256Rf(30%) SF | 2001 |
| 257Db | 152 | 257.1075 | 100,150.0 | --- | 2.3 s | (9/2+) | α→253Lr(>94%) SF(<6%) β⁺→257Rf | 1985 |
| 257mDb | 152 | 257.1077 | 100,290.0 | --- | 670.0 ms | (1/2-) | α→253Lr(>87%) SF(<13%) β⁺→257Rf | 1985 |
| 258Db | 153 | 258.109 | 101,510.0 | --- | 2.17 s | (0-) | α→254Lr(64%) β⁺→258Rf(36%) | 1985 |
| 258mDb | 153 | 258.109 | 101,560.0 | --- | 4.41 s | (5+) | α→254Lr(77%) β⁺→258Rf(23%) SF | 1981 |
| 259Db | 154 | 259.1095 | 101,990.0 | --- | 510.0 ms | (9/2+) | α→255Lr(100%) | 2001 |
| 260Db | 155 | 260.1113 | 103,670.0 | --- | 1.52 s | --- | α→256Lr(90.4%) SF(9.6%) β⁺→260Rf | 1970 |
| 261Db | 156 | 261.112 | 104,310.0 | --- | 4.7 s | (9/2+) | SF(73%) α→257Lr(27%) | 1970 |
| 262Db | 157 | 262.1141 | 106,250.0 | --- | 34.0 s | --- | SF(52%) α→258Lr(48%) β⁺→262Rf | 1971 |
| 263Db | 158 | 263.115 | 107,110.0 | --- | 29.0 s | (9/2+) | SF(56%) α→259Lr(37%) β⁺→263Rf(6.9%) | 1992 |
| 264Db | 159 | 264.1173 | 109,260.0 | --- | 3.0 m | --- | α→260Lr | --- |
| 265Db | 160 | 265.1185 | 110,380.0 | --- | 15.0 m | (9/2+) | α→261Lr | --- |
| 266Db | 161 | 266.121 | 112,740.0 | --- | 1.33 h | --- | α→262Lr SF β⁺→266Rf | 2007 |
| 267Db | 162 | 267.1224 | 114,010.0 | --- | 2.0 h | (9/2+) | SF(100%) | 2004 |
| 268Db | 163 | 268.1257 | 117,060.0 | --- | 1.21 d | --- | SF(100%) β⁺→268Rf α→264Lr | 2004 |
| 269Db | 164 | 269.1279 | 119,150.0 | --- | 3.0 h | (9/2+) | α→265Lr SF | --- |
| 270Db | 165 | 270.1314 | 122,400.0 | --- | 1.7 h | --- | SF(87%) α→266Lr(13%) | 2010 |