| 1 | A | B | C | D | E |
| --- | --- | --- | --- | --- | --- |
| 2 | Meitnerium - Stability and half-lives |  |  |  |  |
| 3 | Isotope | Half-life | Decay mode | Discovery year | Reaction |
| 4 | 266Mt | 1.7 ms | α | 1982 | 209Bi(58Fe,n) |
| 5 | 268Mt | 21 ms | α | 1994 | 272Rg(—,α) |
| 6 | 270Mt | 5.0 ms | α | 2004 | 278Nh(—,2α) |
| 7 | 274Mt | 0.44 s | α | 2006 | 282Nh(—,2α) |
| 8 | 275Mt | 9.7 ms | α | 2003 | 287Mc(—,3α) |
| 9 | 276Mt | 0.72 s | α | 2003 | 288Mc(—,3α) |
| 10 | 277Mt | ~5 ms | SF | 2012 | 293Ts(—,4α) |
| 11 | 278Mt | 7.6 s | α | 2009 | 294Ts(—,4α) |
| 12 | 282Mt | 67 s? | α | 1998? | 290Fl(e−,νe2α)? |

Question: What are the half lives of the The Meitnerium isotopes ²⁷⁶Mt and ²⁷⁴Mt?
Answer: The Meitnerium isotopes ²⁷⁶Mt and ²⁷⁴Mt have half-lives of 0.72 and 0.44 seconds respectively.