Isotopes of meitnerium
List of isotopes
Not directly synthesized, occurs as decay product of ²⁷²Rg This isomer is unconfirmed Not directly synthesized, occurs in decay chain of ²⁷⁸Nh Not directly synthesized, occurs in decay chain of ²⁸²Nh Not directly synthesized, occurs in decay chain of ²⁸⁷Mc Not directly synthesized, occurs in decay chain of ²⁸⁸Mc Not directly synthesized, occurs in decay chain of ²⁹³Ts Not directly synthesized, occurs in decay chain of ²⁹⁴Ts Not directly synthesized, occurs in decay chain of ²⁹⁰Fl and ²⁹⁴Lv; unconfirmed

Isotopes of meitnerium

Section Title: List of isotopes
Table Section Text: Not directly synthesized, occurs as decay product of ²⁷²Rg This isomer is unconfirmed Not directly synthesized, occurs in decay chain of ²⁷⁸Nh Not directly synthesized, occurs in decay chain of ²⁸²Nh Not directly synthesized, occurs in decay chain of ²⁸⁷Mc Not directly synthesized, occurs in decay chain of ²⁸⁸Mc Not directly synthesized, occurs in decay chain of ²⁹³Ts Not directly synthesized, occurs in decay chain of ²⁹⁴Ts Not directly synthesized, occurs in decay chain of ²⁹⁰Fl and ²⁹⁴Lv; unconfirmed

nuclide symbol	Z(p)	N(n)	isotopic mass (u)	half-life	decay mode(s)	daughter isotope(s)	nuclear spin and parity

excitation energy

266Mt	109	157	266.13737(33)#	1.2(4) ms	α	262Bh

268Mt	109	159	268.13865(25)#	21(+8−5) ms	α	264Bh	5+#,6+#

268mMt	0+X keV	0.07(+10−3) s	α	264Bh

270Mt	109	161	270.14033(18)#	0.57 s	α	266Bh

270mMt	1.1 s?	α	266Bh

274Mt	109	165	274.14725(38)#	0.45 s	α	270Bh

275Mt	109	166	275.14882(50)#	9.7(+460−44) ms	α	271Bh

276Mt	109	167	276.15159(59)#	0.72(+87-25) s	α	272Bh

277Mt	109	168	277.15327(82)#	~5 ms	SF	(various)

278Mt	109	169	278.15631(68)#	7.6 s	α	274Bh

282Mt	109	173	67 s?	α	278Bh

Sentence(s)

The ²⁸²Mt has a half-life of 67 seconds.

final_sentence: The ²⁸²Mt has a half-life of 67 seconds.