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List of radioactive elements

Written by Administrator

Tuesday, 04 October 2011 14:11

A list of radioactive elements

Here is a detailed and comprehensive list of radioactive elements along with their atomic and mass numbers, decay modes and half lives. Here 'Beta Decay (^-)' denotes Electron emission while Beta Decay (⁺) denotes Positron emission.

Radioactive Element	Atomic Number	Atomic Mass Number	Decay Type	Half Life
Hydrogen (H)	1	3	Beta Decay (Beta-)	12 years
Beryllium (be)	4	10	Beta Decay (Beta-)	2,700,000 years
Carbon (C)	6	14	Beta Decay (Beta-)	5,730 years
Calcium (Ca)	20	41	Beta Decay (Beta+)	100,000 years
Iron (Fe)	26	59	Beta Decay (Beta-)	45 days
Cobalt (Co)	27	60	Beta Decay (Beta-) Gamma	5 years
Nickel (Ni)	28	59	Beta Decay (Beta+)	80,000 years
Zinc (Zn)	30	65	Beta Decay (Beta-) Gamma	145 days
Selenium (Se)	34	79	Beta Decay (Beta-)	70,000 years
Krypton (Kr)	36	85	Beta Decay (Beta-) Gamma	10 years
Krypton (Kr)	36	90	Beta Decay (Beta-) Gamma	33 seconds
Rubidium (Rb)	37	87	Beta Decay (Beta-)	47 Billion years
Strontium (Sr)	38	89	Beta Decay (Beta-)	53 days
Strontium (Sr)	38	90	Beta Decay (Beta-)	28 years
Yttrium (Y)	39	90	Beta Decay (Beta-) Gamma	64 hrs
Yttrium (Y)	39	91	Beta Decay (Beta-)	58 days
Zirconium (Zr)	40	93	Beta Decay (Beta-)	950,000
Zirconium (Zr)	40	95	Beta Decay (Beta-)	65 days
Niobium (Nb)	41	93	Gamma	4 years
Niobium (Nb)	41	95	Beta Decay (Beta-) Gamma	35 days
Molybdenum (Mo)	42	93	Beta Decay (Beta+)	10,000 years
Technetium (Tc)	43	99	Beta Decay (Beta-) Gamma	210,000
Ruthenium (Ru)	44	103	Beta Decay (Beta-)	40 days
Ruthenium (Ru)	44	106	Beta Decay (Beta-)	1 year
Palladium	46	107	Beta Decay (Beta-) Gamma	7 million years
Silver (Ag)	47	110	Beta Decay (Beta-) Gamma	249 days
Tin (Sn)	50	126	Beta Decay (Beta-)	100,000 years
Antimony (Sb)	51	125	Beta Decay (Beta-)	2 years
Tellurium (Te)	52	127	Beta Decay (Beta-) Gamma	105 days
Tellurium (Te)	52	129	Beta Decay (Beta-)	67 minutes
Iodine (I)	53	129	Beta Decay (Beta-) Gamma	17.2 million years
Iodine (I)	53	131	Beta Decay (Beta-) Gamma	8 days
Iodine (I)	53	134	Beta Decay (Beta-) Gamma	52 minutes
Xenon (Xe)	54	133	Beta Decay (Beta-) Gamma	5 days
Xenon (Xe)	54	137	Beta Decay Beta-) Gamma	4 minutes
Xenon (Xe)	54	138	Beta Decay (Beta-) Gamma	14 minutes
Cesium (Cs)	55	134	Beta Decay (Beta-) Gamma	2 years
Cesium (Cs)	55	135	Beta Decay (Beta-) Gamma	2 million years
Cesium (Cs)	55	137	Beta Decay (Beta-) Gamma	30 years
Cesium (Ce)	58	144	Beta Decay (Beta-)	285 days
Promethium (Pm)	61	147	Beta Decay (Beta-) Gamma	2 years
Europium (Eu)	63	154	Beta Decay (Beta-), Beta Decay (Beta+) Gamma	16 years
Europium (Eu)	63	155	Beta Decay (Beta-)	2 tears
Lead (Pb)	82	210	Beta Decay (Beta-) Alpha	21 years
Bismuth (Bi)	83	210	Alpha	3 million years
Polonium (Po)	84	210	Alpha	138 days
Radon (Rn)	86	220	Alpha, Beta Decay (Beta+)	1 minute
Radon (Rn)	86	222	Alpha	4 days
Radium (Ra)	88	224	Alpha	4 days
Radium (Ra)	88	225	Beta Decay (Beta-)	15 days
Radium (Ra)	88	226	Alpha	1,622 years
Thorium (Th)	90	228	Alpha	2 years
Thorium (Th)	90	229	Alpha	7,340 years
Thorium (Th)	90	230	Alpha	80,000 years
Thorium (Th)	90	232	Alpha	14 years
Thorium (Th)	90	234	Beta Decay (Beta-)	24 days
Proactinium (Pa)	91	226	Alpha, Beta Decay (Beta+)	2 minutes
Uranium (U)	92	233	Alpha	162,000 years
Uranium (U)	92	234	Alpha	248,000 years
Uranium (U)	92	235	Alpha	713 million years
Uranium (U)	92	236	Alpha	23.9 million years
Uranium (U)	92	238	Alpha	4.51 billion years
Neptunium (Np)	93	237	Alpha	2.2 million years
Plutonium (Pu)	94	236	Alpha	285 years
Plutonium (Pu)	94	238	Alpha	86 years
Plutonium (Pu)	94	239	Alpha	24,390 years
Plutonium (Pu)	94	240	Alpha	6,580 years
Plutonium (Pu)	94	241	Beta Decay (Beta-), Alpha	13 years
Plutonium (Pu)	94	242	Alpha	379,000 years
Plutonium (Pu)	94	243	Alpha	5 years
Plutonium (Pu)	94	244	Alpha	76 million years
Americium (Am)	95	241	Alpha	458 years
Americium (Am)	95	242	Beta Decay (Beta-), Beta Decay (Beta+), Alpha, Gamma	16 hours
Americium (Am)	95	243	Alpha	7,950
Curium (Cm)	96	242	Alpha	163 days
Curium (Cm)	96	243	Alpha	35 years
Curium (Cm)	96	244	Alpha	18 years
Curium (Cm)	96	247	Alpha	40 million years

Last Updated on Wednesday, 05 October 2011 14:58

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