Meitnerium
Stability and half-lives

Isotope
Half-life
Decay mode
Discovery year
Reaction
266Mt
1.7 ms
α
1982
209Bi(58Fe,n)
268Mt
21 ms
α
1994
272Rg(—,α)
270Mt
5.0 ms
α
2004
278Nh(—,2α)
274Mt
0.44 s
α
2006
282Nh(—,2α)
275Mt
9.7 ms
α
2003
287Mc(—,3α)
276Mt
0.72 s
α
2003
288Mc(—,3α)
277Mt
~5 ms
SF
2012
293Ts(—,4α)
278Mt
7.6 s
α
2009
294Ts(—,4α)
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.