| 1 | A | B | C | D | E | F | G |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 2 | Darmstadtium - Isotopes |  |  |  |  |  |  |
| 3 | Isotope | Half-life | Half-life | Half-life | Decay mode | Discovery year | Discovery reaction |
| 4 | Isotope | Recent publications | Ref | NUBASE 2016 | Decay mode | Discovery year | Discovery reaction |
| 5 | 267Ds | 2.8 µs | - | 10 µs | α | 1994 | 209Bi(59Co,n) |
| 6 | 269Ds | 179 µs | - | 230 µs | α | 1994 | 208Pb(62Ni,n) |
| 7 | 270Ds | 100 µs | - | 205 µs | α | 2000 | 207Pb(64Ni,n) |
| 8 | 270mDs | 6 ms | - | 10 ms | α | 2000 | 207Pb(64Ni,n) |
| 9 | 271Ds | 69 ms | - | 90 ms | α | 1994 | 208Pb(64Ni,n) |
| 10 | 271mDs | 1.63 ms | - | 1.7 ms | α | 1994 | 208Pb(64Ni,n) |
| 11 | 273Ds | 0.19 ms | - | 240 µs | α | 1996 | 244Pu(34S,5n) |
| 12 | 277Ds | 3.5 ms | - | 6 ms | α | 2010 | 285Fl(—,2α) |
| 13 | 279Ds | 0.21 s | - | 210 ms | SF, α | 2003 | 287Fl(—,2α) |
| 14 | 280Ds | 6.7 ms | - | — | SF | 2014 | 292Lv(—,3α) |
| 15 | 281Ds | 12.7 s | - | 14 s | SF, α | 2004 | 289Fl(—,2α) |

Question: Which isotopes have a half life of 100µs and 69ms?
Answer: Two darmstadtium isotopes are darmstadtium-270 (100µs) and darmstadtium-271 (69ms).