Isotopes of the Element Radon
[Click for Main Data]

Most of the isotope data on this site has been obtained from the National Nuclear Data Center. Please visit their site for more information.

All Known Isotopes of the Element Radon

Mass Number	Half-life	Decay Mode	Branching Percentage

196	3 milliseconds	Alpha Decay	> 0.00

197	65 milliseconds	Alpha Decay	100.00

197_m	19 milliseconds	Alpha Decay	100.00

198	65 milliseconds	Alpha Decay	No Data Available

		Electron Capture	No Data Available

199	0.62 seconds	Alpha Decay	94.00

		Electron Capture	6.00

199_m	0.32 seconds	Alpha Decay	97.00

		Electron Capture	3.00

200	0.96 seconds	Alpha Decay	~ 98.00

		Electron Capture	~ 2.00

201	7.1 seconds	Alpha Decay	~ 80.00

		Electron Capture	~ 20.00

201_m	3.8 seconds	Alpha Decay	~ 90.00

		Electron Capture	~ 10.00

		Isomeric Transition	~ 0.00

202	10.0 seconds	Alpha Decay	86.00

		Electron Capture	14.00

203	42 seconds	Alpha Decay	66.00

		Electron Capture	34.00

203_m	26.7 seconds	Alpha Decay	~ 80.00

		Electron Capture	~ 20.00

		Isomeric Transition	< 0.10

204	1.17 minutes	Alpha Decay	73.00

		Electron Capture	27.00

205	2.8 minutes	Electron Capture	77.00

		Alpha Decay	23.00

206	5.67 minutes	Alpha Decay	62.00

		Electron Capture	38.00

207	9.25 minutes	Electron Capture	79.00

		Alpha Decay	21.00

208	24.35 minutes	Alpha Decay	62.00

		Electron Capture	38.00

209	28.5 minutes	Electron Capture	83.00

		Alpha Decay	17.00

210	2.4 hours	Alpha Decay	96.00

		Electron Capture	4.00

211	14.6 hours	Electron Capture	72.60

		Alpha Decay	27.40

212	23.9 minutes	Alpha Decay	100.00

213	25.0 milliseconds	Alpha Decay	100.00

214	0.27 microseconds	Alpha Decay	100.00

215	2.30 microseconds	Alpha Decay	100.00

216	45 microseconds	Alpha Decay	100.00

217	0.54 milliseconds	Alpha Decay	100.00

218	35 milliseconds	Alpha Decay	100.00

219	3.96 seconds	Alpha Decay	100.00

220	55.6 seconds	Alpha Decay	100.00

221	25.7 minutes	Beta-minus Decay	78.00

		Alpha Decay	22.00

222	3.8235 days	Alpha Decay	100.00

223	24.3 minutes	Beta-minus Decay	100.00

224	107 minutes	Beta-minus Decay	100.00

225	4.66 minutes	Beta-minus Decay	100.00

226	7.4 minutes	Beta-minus Decay	100.00

227	20.8 seconds	Beta-minus Decay	100.00

228	65 seconds	Beta-minus Decay	100.00

This page is maintained by Steve Gagnon.

Citation and linking information

Isotopes of the Element Radon[Click for Main Data]

Isotopes of the Element Radon
[Click for Main Data]