| 1 | A | B | C | D | E |
| --- | --- | --- | --- | --- | --- |
| 2 | Bohrium - Isotopes |  |  |  |  |
| 3 | Isotope | Half-life | Decay mode | Discovery year | Reaction |
| 4 | 260Bh | 35 ms | α | 2007 | 209Bi(52Cr,n) |
| 5 | 261Bh | 11.8 ms | α | 1986 | 209Bi(54Cr,2n) |
| 6 | 262Bh | 84 ms | α | 1981 | 209Bi(54Cr,n) |
| 7 | 262mBh | 9.6 ms | α | 1981 | 209Bi(54Cr,n) |
| 8 | 264Bh | 0.97 s | α | 1994 | 272Rg(—,2α) |
| 9 | 265Bh | 0.9 s | α | 2004 | 243Am(26Mg,4n) |
| 10 | 266Bh | 0.9 s | α | 2000 | 249Bk(22Ne,5n) |
| 11 | 267Bh | 17 s | α | 2000 | 249Bk(22Ne,4n) |
| 12 | 270Bh | 61 s | α | 2006 | 282Nh(—,3α) |
| 13 | 271Bh | 1.2 s | α | 2003 | 287Mc(—,4α) |
| 14 | 272Bh | 9.8 s | α | 2005 | 288Mc(—,4α) |
| 15 | 274Bh | 40 s | α | 2009 | 294Ts(—,5α) |
| 16 | 278Bh | 11.5 min? | SF | 1998? | 290Fl(e−,νe3α)? |

Question: What are the half-lives of the Bohrium isotopes ²⁷⁰Bh and ²⁷⁴Bh?
Answer: The Bohrium isotopes ²⁷⁰Bh and ²⁷⁴Bh have an half-lives of about 61 s and 40 s.