Isotopes of radon
List of isotopes
Abbreviations: IT: Isomeric transition Intermediate decay product of ²³⁸U Intermediate decay product of ²³⁵U Intermediate decay product of ²³²Th Source of element's name

Isotopes of radon

Section Title: List of isotopes
Table Section Text: Abbreviations: IT: Isomeric transition Intermediate decay product of ²³⁸U Intermediate decay product of ²³⁵U Intermediate decay product of ²³²Th Source of element's name

nuclide symbol	historic name	Z(p)	N(n)	isotopic mass (u)	half-life	decay mode(s)	daughter isotope(s)	nuclear spin and parity	representative isotopic composition (mole fraction)	range of natural variation (mole fraction)

excitation energy

195Rn	86	109	195.00544(5)	6 ms	3/2−#

195mRn	50(50) keV	6 ms	13/2+#

196Rn	86	110	196.002115(16)	4.7(11) ms [4.4(+13−9) ms]	α	192Po	0+

β+ (rare)	196At

197Rn	86	111	197.00158(7)	66(16) ms [65(+23−14) ms]	α	193Po	3/2−#

β+ (rare)	197At

197mRn	200(60)# keV	21(5) ms [19(+8−4) ms]	α	193Po	(13/2+)

β+ (rare)	197At

198Rn	86	112	197.998679(14)	65(3) ms	α (99%)	194Po	0+

β+ (1%)	198At

199Rn	86	113	198.99837(7)	620(30) ms	α (94%)	195Po	3/2−#

β+ (6%)	199At

199mRn	180(70) keV	320(20) ms	α (97%)	195Po	13/2+#

β+ (3%)	199At

200Rn	86	114	199.995699(14)	0.96(3) s	α (98%)	196Po	0+

β+ (2%)	200At

201Rn	86	115	200.99563(8)	7.0(4) s	α (80%)	197Po	(3/2−)

β+ (20%)	201At

201mRn	280(90)# keV	3.8(1) s	α (90%)	197Po	(13/2+)

β+ (10%)	201At

IT (<1%)	201Rn

202Rn	86	116	201.993263(19)	9.94(18) s	α (85%)	198Po	0+

β+ (15%)	202At

203Rn	86	117	202.993387(25)	44.2(16) s	α (66%)	199Po	(3/2−)

β+ (34%)	203At

203mRn	363(4) keV	26.7(5) s	α (80%)	199Po	13/2(+)

β+ (20%)	203At

204Rn	86	118	203.991429(16)	1.17(18) min	α (73%)	200Po	0+

β+ (27%)	204At

205Rn	86	119	204.99172(5)	170(4) s	β+ (77%)	205At	5/2−

α (23%)	201Po

206Rn	86	120	205.990214(16)	5.67(17) min	α (62%)	202Po	0+

β+ (38%)	206At

207Rn	86	121	206.990734(28)	9.25(17) min	β+ (79%)	207At	5/2−

α (21%)	203Po

207mRn	899.0(10) keV	181(18) µs	(13/2+)

208Rn	86	122	207.989642(12)	24.35(14) min	α (62%)	204Po	0+

β+ (38%)	208At

209Rn	86	123	208.990415(21)	28.5(10) min	β+ (83%)	209At	5/2−

α (17%)	205Po

209m1Rn	1173.98(13) keV	13.4(13) µs	13/2+

209m2Rn	3636.78(23) keV	3.0(3) µs	(35/2+)

210Rn	86	124	209.989696(9)	2.4(1) h	α (96%)	206Po	0+

β+ (4%)	210At

210m1Rn	1690(15) keV	644(40) ns	8+#

210m2Rn	3837(15) keV	1.06(5) µs	(17)−

210m3Rn	6493(15) keV	1.04(7) µs	(22)+

211Rn	86	125	210.990601(7)	14.6(2) h	α (72.6%)	207Po	1/2−

β+ (27.4%)	211At

212Rn	86	126	211.990704(3)	23.9(12) min	α	208Po	0+

β+β+ (rare)	212Po

213Rn	86	127	212.993883(6)	19.5(1) ms	α	209Po	(9/2+)

214Rn	86	128	213.995363(10)	0.27(2) µs	α	210Po	0+

β+β+ (rare)	214Po

214mRn	4595.4 keV	245(30) ns	(22+)

215Rn	86	129	214.998745(8)	2.30(10) µs	α	211Po	9/2+

216Rn	86	130	216.000274(8)	45(5) µs	α	212Po	0+

217Rn	86	131	217.003928(5)	0.54(5) ms	α	213Po	9/2+

218Rn	86	132	218.0056013(25)	35(5) ms	α	214Po	0+	Trace

219Rn	Actinon Actinium emanation	86	133	219.0094802(27)	3.96(1) s	α	215Po	5/2+	Trace

220Rn	Thoron Thorium emanation	86	134	220.0113940(24)	55.6(1) s	α	216Po	0+	Trace

β−β− (rare)	220Ra

221Rn	86	135	221.015537(6)	25.7(5) min	β− (78%)	221Fr	7/2(+)

α (22%)	217Po

222Rn	Radon Radium emanation Emanation Emanon Niton	86	136	222.0175777(25)	3.8235(3) d	α	218Po	0+	Trace

223Rn	86	137	223.02179(32)#	24.3(4) min	β−	223Fr	7/2

224Rn	86	138	224.02409(32)#	107(3) min	β−	224Fr	0+

225Rn	86	139	225.02844(32)#	4.66(4) min	β−	225Fr	7/2−

226Rn	86	140	226.03089(43)#	7.4(1) min	β−	226Fr	0+

227Rn	86	141	227.03541(45)#	20.8(7) s	β−	227Fr	5/2(+#)

228Rn	86	142	228.03799(44)#	65(2) s	β−	228Fr	0+

229Rn	86	143	229.0426536(141)	12(1) s	β−	229Fr

230Rn	86	144	β−

231Rn	86	145	β−

Sentence(s)

The isotope of radon, ²²²Rn have a half-life of 3.823 days, which decays into ²¹⁸ Po.

final_sentence: The isotope of radon, ²²²Rn have a half-life of 3.823 days, which decays into ²¹⁸ Po.