List of elements by half-life
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This is a list of chemical elements sorted by element half-life and colour coded according to chemical series. Numbers in parentheses give the uncertainty in the "concise notation" defined in the IUPAC reference "whereby standard uncertainty is given in parenthesis next to the least significant digits to which it applies", e.g., 1.00794(7) stands for 1.00794 ± 0.00007.
Alkali metals | Alkaline earth metals | Lanthanides | Actinides | Transition metals |
Poor metals | Metalloids | Nonmetals | Halogens | Noble gases |
Atomic No. | Name | Half-life |
---|---|---|
1 | hydrogen | stable |
2 | helium | stable |
3 | lithium | stable |
4 | beryllium | stable |
5 | boron | stable |
6 | carbon | stable |
7 | nitrogen | stable |
8 | oxygen | stable |
9 | fluorine | stable |
10 | neon | stable |
11 | sodium | stable |
12 | magnesium | stable |
13 | aluminium | stable |
14 | silicon | stable |
15 | phosphorus | stable |
16 | sulfur | stable |
17 | chlorine | stable |
18 | argon | stable |
19 | potassium | stable |
20 | calcium | stable |
21 | scandium | stable |
22 | titanium | stable |
23 | vanadium | stable |
24 | chromium | stable |
25 | manganese | stable |
26 | iron | stable |
27 | cobalt | stable |
28 | nickel | stable |
29 | copper | stable |
30 | zinc | stable |
31 | gallium | stable |
32 | germanium | stable |
33 | arsenic | stable |
34 | selenium | stable |
35 | bromine | stable |
36 | krypton | stable |
37 | rubidium | stable |
38 | strontium | stable |
39 | yttrium | stable |
40 | zirconium | stable |
41 | niobium | stable |
42 | molybdenum | stable |
44 | ruthenium | stable |
45 | rhodium | stable |
46 | palladium | stable |
47 | silver | stable |
48 | cadmium | stable |
49 | indium | stable |
50 | tin | stable |
51 | antimony | stable |
52 | tellurium | stable |
53 | iodine | stable |
54 | xenon | stable |
55 | caesium | stable |
56 | barium | stable |
57 | lanthanum | stable |
58 | cerium | stable |
59 | praseodymium | stable |
60 | neodymium | stable |
62 | samarium | stable |
63 | europium | stable |
64 | gadolinium | stable |
65 | terbium | stable |
66 | dysprosium | stable |
67 | holmium | stable |
68 | erbium | stable |
69 | thulium | stable |
70 | ytterbium | stable |
71 | lutetium | stable |
72 | hafnium | stable |
73 | tantalum | stable |
74 | tungsten | stable |
75 | rhenium | stable |
76 | osmium | stable |
77 | iridium | stable |
78 | platinum | stable |
79 | gold | stable |
80 | mercury | stable |
81 | thallium | stable |
82 | lead | stable |
83 | bismuth | stable |
90 | thorium | 1.405x1010 years (y) |
92 | uranium | 4.468x109 y |
94 | plutonium | 8.08x107 y |
96 | curium | 1.56x107 y |
93 | neptunium | 2.144x106 y |
43 | technetium | 211,100 y |
91 | protactinium | 32,760 y |
95 | americium | 7370 y |
88 | radium | 1602 y |
97 | berkelium | 1380 y |
98 | californium | 898 y |
84 | polonium | 103 y |
89 | actinium | 21.77 y |
61 | promethium | 17.7 y |
99 | einsteinium | 471.7 days (d) |
100 | fermium | 100.5 d |
101 | mendelevium | 51.5 d |
86 | radon | 3.82 d |
105 | dubnium | 32 hours (h) |
104 | rutherfordium | 13 h |
103 | lawrencium | 10 h |
85 | astatine | 8.1 h |
107 | bohrium | 1.5 h |
106 | seaborgium | 1 h |
108 | hassium | 1 h |
102 | nobelium | 58 minutes (m) |
109 | meitnerium | 30 m |
87 | francium | 22.0 m |
113 | ununtrium | 20 m |
111 | roentgenium | 10 m |
115 | ununpentium | 1 m |
110 | darmstadtium | 11 seconds (s) |
112 | ununbium | 10 s |
114 | ununquadium | 5 s |
116 | ununhexium | 0.018 s |