Z 	Symbol 	Element 	Mass number 	Half-life
43	Tc	technetium	97	4.21(16) Ma
98	4.2(3) Ma
61	Pm	promethium	145	17.7(4) a
84	Po	polonium	209	102(5) a
85	At	astatine	210	8.1(4) h
86	Rn	radon	222	3.8235(3) d
87	Fr	francium	223	22.00(7) min
88	Ra	radium	226	1600(7) a
89	Ac	actinium	227	21.772(3) a
93	Np	neptunium	237	2144(7) ka
94	Pu	plutonium	244	80(0.9) Ma
95	Am	americium	243	7.37(4) ka
96	Cm	curium	247	15.6(5) Ma
97	Bk	berkelium	247	1.38(25) ka
98	Cf	californium	251	900(40) a
99	Es	einsteinium	252	471.7(1.9) d
100	Fm	fermium	257	100.5(0.2) d
101	Md	mendelevium	258	51.5(0.3) d
102	No	nobelium	259	58(5) min
103	Lr	lawrencium	262	4(1) h
104	Rf	rutherfordium	267	2.5(1.5) h
105	Db	dubnium	268	30.8(5.0) h
270	90(70) h
106	Sg	seaborgium	269	8(6) min
271	3.1(1.6) min
107	Bh	bohrium	270	3.8(3.0) min
274	3.4(2.7) min
108	Hs	hassium	269	27(17) s
277	130(100) s
109	Mt	meitnerium	276	10(5) s
278	29(23) s
110	Ds	darmstadtium	281	14(4) s
111	Rg	roentgenium 	281	37(17) s
112	Cn	copernicium	285	32(9) s
113	Nh	nihonium	286	70(60) s
114	Fl	flerovium	289	2.4(6) s
115	Mc	moscovium	288	190(40) ms
289	340(180) ms
116	Lv	livermorium	293	80(40) ms
117	Ts	tennessine	294	290(230) ms
118	Og	oganesson	294	1.4(7) ms