Radioactive elements half-life and type of radiation

Symbol	Serial number	The mass number of the isotope	Half life	Radiation
Ас	89	227	22 years	α, β
Ат	95	243	7,8·10³ years	α
At	85	210	8,3 hours	Эл. захв.
Вк	97	247	10⁴ years	α
Cf	98	249	360 years	α
Cm	96	247	4·10⁷ years	α
Es	99	254	480 days	α
Fm	100	253	3 days	Эл. захв., α
Fr	87	223	22 minutes	α, β
Lr	103	257	8 seconds	α
Md	101	256	1,5 hours	Эл. захв.
Np	93	237	2,1·10⁸years	α
No	102	256	8 seconds	α
Pa	91	231	3,2·10⁴years	α
Pm	61	147	2,5 years	β
Po	84	210	138,4 days	α
Pu	94	242	3,3·10⁵years	α
Ra	88	226	1622 years	α
Rn	86	222	3,83 days	α
Tc	43	99	2,1·10⁵years	β
Th	90	232	1,4·10¹⁰years	α
U	92	238	4,5·10⁹years	α

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