Radioactivity & half-life

Whether an element has stable isotopes, and for the others the longest-lived known isotope with its half-life and decay mode. Half-life always belongs to an isotope, never to an element in general.

Dati disponibili 118 su 118 Ha isotopi stabili 76Nessun isotopo stabile 42

Mostrati 118 di 118 elementi

	Simbolo	Nome
1	H	Hydrogen	Ha isotopi stabili	—	∞	—
2	He	Helium	Ha isotopi stabili	—	∞	—
3	Li	Lithium	Ha isotopi stabili	—	∞	—
4	Be	Beryllium	Ha isotopi stabili	—	∞	—
5	B	Boron	Ha isotopi stabili	—	∞	—
6	C	Carbon	Ha isotopi stabili	—	∞	—
7	N	Nitrogen	Ha isotopi stabili	—	∞	—
8	O	Oxygen	Ha isotopi stabili	—	∞	—
9	F	Fluorine	Ha isotopi stabili	—	∞	—
10	Ne	Neon	Ha isotopi stabili	—	∞	—
11	Na	Sodium	Ha isotopi stabili	—	∞	—
12	Mg	Magnesium	Ha isotopi stabili	—	∞	—
13	Al	Aluminum	Ha isotopi stabili	—	∞	—
14	Si	Silicon	Ha isotopi stabili	—	∞	—
15	P	Phosphorus	Ha isotopi stabili	—	∞	—
16	S	Sulfur	Ha isotopi stabili	—	∞	—
17	Cl	Chlorine	Ha isotopi stabili	—	∞	—
18	Ar	Argon	Ha isotopi stabili	—	∞	—
19	K	Potassium	Ha isotopi stabili	—	∞	—
20	Ca	Calcium	Ha isotopi stabili	—	∞	—
21	Sc	Scandium	Ha isotopi stabili	—	∞	—
22	Ti	Titanium	Ha isotopi stabili	—	∞	—
23	V	Vanadium	Ha isotopi stabili	—	∞	—
24	Cr	Chromium	Ha isotopi stabili	—	∞	—
25	Mn	Manganese	Ha isotopi stabili	—	∞	—
26	Fe	Iron	Ha isotopi stabili	—	∞	—
27	Co	Cobalt	Ha isotopi stabili	—	∞	—
28	Ni	Nickel	Ha isotopi stabili	—	∞	—
29	Cu	Copper	Ha isotopi stabili	—	∞	—
30	Zn	Zinc	Ha isotopi stabili	—	∞	—
31	Ga	Gallium	Ha isotopi stabili	—	∞	—
32	Ge	Germanium	Ha isotopi stabili	—	∞	—
33	As	Arsenic	Ha isotopi stabili	—	∞	—
34	Se	Selenium	Ha isotopi stabili	—	∞	—
35	Br	Bromine	Ha isotopi stabili	—	∞	—
36	Kr	Krypton	Ha isotopi stabili	—	∞	—
37	Rb	Rubidium	Ha isotopi stabili	—	∞	—
38	Sr	Strontium	Ha isotopi stabili	—	∞	—
39	Y	Yttrium	Ha isotopi stabili	—	∞	—
40	Zr	Zirconium	Ha isotopi stabili	—	∞	—
41	Nb	Niobium	Ha isotopi stabili	—	∞	—
42	Mo	Molybdenum	Ha isotopi stabili	—	∞	—
43	Tc	Technetium	Nessun isotopo stabile	Tc-98	4.2 My	β-=100%
44	Ru	Ruthenium	Ha isotopi stabili	—	∞	—
45	Rh	Rhodium	Ha isotopi stabili	—	∞	—
46	Pd	Palladium	Ha isotopi stabili	—	∞	—
47	Ag	Silver	Ha isotopi stabili	—	∞	—
48	Cd	Cadmium	Ha isotopi stabili	—	∞	—
49	In	Indium	Ha isotopi stabili	—	∞	—
50	Sn	Tin	Ha isotopi stabili	—	∞	—
51	Sb	Antimony	Ha isotopi stabili	—	∞	—
52	Te	Tellurium	Ha isotopi stabili	—	∞	—
53	I	Iodine	Ha isotopi stabili	—	∞	—
54	Xe	Xenon	Ha isotopi stabili	—	∞	—
55	Cs	Cesium	Ha isotopi stabili	—	∞	—
56	Ba	Barium	Ha isotopi stabili	—	∞	—
57	La	Lanthanum	Ha isotopi stabili	—	∞	—
58	Ce	Cerium	Ha isotopi stabili	—	∞	—
59	Pr	Praseodymium	Ha isotopi stabili	—	∞	—
60	Nd	Neodymium	Ha isotopi stabili	—	∞	—
61	Pm	Promethium	Nessun isotopo stabile	Pm-145	17.7 y	ε=100%
62	Sm	Samarium	Ha isotopi stabili	—	∞	—
63	Eu	Europium	Nessun isotopo stabile	Eu-151	4.6 Ey	α=100%
64	Gd	Gadolinium	Ha isotopi stabili	—	∞	—
65	Tb	Terbium	Ha isotopi stabili	—	∞	—
66	Dy	Dysprosium	Ha isotopi stabili	—	∞	—
67	Ho	Holmium	Ha isotopi stabili	—	∞	—
68	Er	Erbium	Ha isotopi stabili	—	∞	—
69	Tm	Thulium	Ha isotopi stabili	—	∞	—
70	Yb	Ytterbium	Ha isotopi stabili	—	∞	—
71	Lu	Lutetium	Ha isotopi stabili	—	∞	—
72	Hf	Hafnium	Ha isotopi stabili	—	∞	—
73	Ta	Tantalum	Ha isotopi stabili	—	∞	—
74	W	Tungsten	Nessun isotopo stabile	W-184	8.9 Zy	α ?
75	Re	Rhenium	Ha isotopi stabili	—	∞	—
76	Os	Osmium	Nessun isotopo stabile	Os-192	53 Ey	2β- ?
77	Ir	Iridium	Ha isotopi stabili	—	∞	—
78	Pt	Platinum	Ha isotopi stabili	—	∞	—
79	Au	Gold	Ha isotopi stabili	—	∞	—
80	Hg	Mercury	Ha isotopi stabili	—	∞	—
81	Tl	Thallium	Ha isotopi stabili	—	∞	—
82	Pb	Lead	Nessun isotopo stabile	Pb-208	2.6 Zy	α ?
83	Bi	Bismuth	Nessun isotopo stabile	Bi-209	20.1 Ey	α=100%
84	Po	Polonium	Nessun isotopo stabile	Po-209	124 y	α=99.546±0.7%
85	At	Astatine	Nessun isotopo stabile	At-210	8.1 h	β+=99.825±2%
86	Rn	Radon	Nessun isotopo stabile	Rn-222	3.82 d	α=100%
87	Fr	Francium	Nessun isotopo stabile	Fr-223	22 min	β-≈100%
88	Ra	Radium	Nessun isotopo stabile	Ra-226	1.6 ky	α=100%
89	Ac	Actinium	Nessun isotopo stabile	Ac-227	21.8 y	β-=98.62±3.6%
90	Th	Thorium	Nessun isotopo stabile	Th-232	14 Gy	α=100%
91	Pa	Protactinium	Nessun isotopo stabile	Pa-231	32.6 ky	α=100%
92	U	Uranium	Nessun isotopo stabile	U-238	4.46 Gy	α=100%
93	Np	Neptunium	Nessun isotopo stabile	Np-237	2.14 My	α=100%
94	Pu	Plutonium	Nessun isotopo stabile	Pu-244	81.3 My	α=99.877±0.6%
95	Am	Americium	Nessun isotopo stabile	Am-243	7.35 ky	α=100%
96	Cm	Curium	Nessun isotopo stabile	Cm-247	15.6 My	α=100%
97	Bk	Berkelium	Nessun isotopo stabile	Bk-247	1.38 ky	α≈100%
98	Cf	Californium	Nessun isotopo stabile	Cf-251	898 y	α≈100%
99	Es	Einsteinium	Nessun isotopo stabile	Es-252	1.29 y	α=78±0.2%
100	Fm	Fermium	Nessun isotopo stabile	Fm-257	101 d	α=99.790±0.4%
101	Md	Mendelevium	Nessun isotopo stabile	Md-258	51.6 d	α≈100%
102	No	Nobelium	Nessun isotopo stabile	No-261	3 h	α ?
103	Lr	Lawrencium	Nessun isotopo stabile	Lr-266	22 h	SF=100%
104	Rf	Rutherfordium	Nessun isotopo stabile	Rf-266	4 h	α ?
105	Db	Dubnium	Nessun isotopo stabile	Db-268	1.21 d	SF≈100%
106	Sg	Seaborgium	Nessun isotopo stabile	Sg-269	5 min	α≈100%
107	Bh	Bohrium	Nessun isotopo stabile	Bh-270	3.8 min	α=100%
108	Hs	Hassium	Nessun isotopo stabile	Hs-269	15 s	α=100%
109	Mt	Meitnerium	Nessun isotopo stabile	Mt-279	20 s	α ?
110	Ds	Darmstadtium	Nessun isotopo stabile	Ds-282	4.2 min	α≈100%
111	Rg	Roentgenium	Nessun isotopo stabile	Rg-282	2.17 min	α=100%
112	Cn	Copernicium	Nessun isotopo stabile	Cn-285	30 s	α=100%
113	Nh	Nihonium	Nessun isotopo stabile	Nh-289	30 s	α ?
114	Fl	Flerovium	Nessun isotopo stabile	Fl-290	1.33 min	α≈100%
115	Mc	Moscovium	Nessun isotopo stabile	Mc-292	5 s	α ?
116	Lv	Livermorium	Nessun isotopo stabile	Lv-293	70 ms	α≈100%
117	Ts	Tennessine	Nessun isotopo stabile	Ts-294	70 ms	α=100%
118	Og	Oganesson	Nessun isotopo stabile	Og-293	1 ms	α ?