Isotopes of radon

{{Redirect|Thoron|the genus of wasps|Thoron (wasp)}} {{Short description|none}} {{Infobox radon isotopes}} There are 39 known isotopes of radon (₈₆Rn), from ¹⁹³Rn to ²³¹Rn; all are radioactive. The most stable isotope is ²²²Rn with a half-life of 3.8215 days, which decays into {{SimpleNuclide|Polonium|218|link=yes}}.

Six isotopes of radon, ^217-222Rn, occur in trace quantities in nature as decay products of, respectively, ²¹⁷At, ²¹⁸At, ²²³Ra, ²²⁴Ra, ²²⁵Ra, and ²²⁶Ra. ²¹⁷Rn and ²²¹Rn are produced in rare branches in the decay chain of trace quantities of ²³⁷Np; ²²²Rn (and also ²¹⁸Rn in a rare branch) is an intermediate step in the decay chain of ²³⁸U; ²¹⁹Rn is an intermediate step in the decay chain of ²³⁵U; and ²²⁰Rn occurs in the decay chain of ²³²Th.

== List of isotopes == {{Isotopes table | symbol = Rn | refs = NUBASE2020, AME2020 II, <!-- updated 2024-09-02 --> IsotopeFRIB, IsomerFRIB | notes = m, histname, exen#, unc(), mass#, spin(), spin#, discoveryname }} |-id=Radon-193 | ¹⁹³Rn | | style="text-align:right" | 86 | style="text-align:right" | 107 | 193.009708(27) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/86/193.pdf 2006] | 1.15(27) ms | α | ¹⁸⁹Po | (3/2−) | |-id=Radon-194 | ¹⁹⁴Rn | | style="text-align:right" | 86 | style="text-align:right" | 108 | 194.006146(18) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/86/194.pdf 2006] | 780(160) μs | α | ¹⁹⁰Po | 0+ | |-id=Radon-195 | ¹⁹⁵Rn | | style="text-align:right" | 86 | style="text-align:right" | 109 | 195.005422(55) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/86/195.pdf 2001] | 7(3)&nbsp;ms | α | ¹⁹¹Po | 3/2− | |-id=Radon-195m | style="text-indent:1em" | ^195mRn<ref group="n" name="order">Order of ground state and isomer is uncertain.</ref> | | colspan="3" style="text-indent:2em" | 80(50)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/86/195Rn-1.pdf 2001] | 6(3)&nbsp;ms | α | ¹⁹¹Po | 13/2+ | |-id=Radon-196 | ¹⁹⁶Rn | | style="text-align:right" | 86 | style="text-align:right" | 110 | 196.002120(15) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/86/196.pdf 1995] | 4.7(11)&nbsp;ms | α | ¹⁹²Po | 0+ | |-id=Radon-197 | ¹⁹⁷Rn | | style="text-align:right" | 86 | style="text-align:right" | 111 | 197.001621(17) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/86/197.pdf 1995] | 54(6)&nbsp;ms | α | ¹⁹³Po | 3/2− | |-id=Radon-197m | style="text-indent:1em" | ^197mRn | | colspan="3" style="text-indent:2em" | 199(11)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/86/197Rn-1.pdf 1995] | 25.6(25)&nbsp;ms | α | ¹⁹³Po | 13/2+ | |-id=Radon-198 | ¹⁹⁸Rn | | style="text-align:right" | 86 | style="text-align:right" | 112 | 197.998679(14) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/86/198.pdf 1984] | 64.4(16)&nbsp;ms | α | ¹⁹⁴Po | 0+ | |-id=Radon-199 | ¹⁹⁹Rn | | style="text-align:right" | 86 | style="text-align:right" | 113 | 198.9983254(78) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/86/199.pdf 1980] | 590(30)&nbsp;ms | α | ¹⁹⁵Po | 3/2− | |-id=Radon-199m | style="text-indent:1em" | ^199mRn | | colspan="3" style="text-indent:2em" | 220(11)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/86/199Rn-1.pdf 1980] | 310(20)&nbsp;ms | α | ¹⁹⁵Po | 13/2+ | |-id=Radon-200 | ²⁰⁰Rn | | style="text-align:right" | 86 | style="text-align:right" | 114 | 199.9957053(62) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/86/200.pdf 1971] | 1.09(16)&nbsp;s | α | ¹⁹⁶Po | 0+ | |-id=Radon-200m | style="text-indent:1em" | ^200mRn | | colspan="3" style="text-indent:2em" | 2320(20)#&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/86/200Rn-1.pdf 2002] | 28(9)&nbsp;μs | IT | ²⁰⁰Rn | | |-id=Radon-201 | ²⁰¹Rn | | style="text-align:right" | 86 | style="text-align:right" | 115 | 200.995591(11) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/86/201.pdf 1967] | 7.0(4)&nbsp;s | α | ¹⁹⁷Po | 3/2− | |-id=Radon-201m | style="text-indent:1em" | ^201mRn | | colspan="3" style="text-indent:2em" | 245(12)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/86/201Rn-1.pdf 1971] | 3.8(1)&nbsp;s | α | ¹⁹⁷Po | 13/2+ | |-id=Radon-202 | rowspan=2|²⁰²Rn | rowspan=2| | rowspan=2 style="text-align:right" | 86 | rowspan=2 style="text-align:right" | 116 | rowspan=2|201.993264(19) | rowspan=2 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/86/202.pdf 1967] | rowspan=2|9.7(1)&nbsp;s | α (78%) | ¹⁹⁸Po | rowspan=2|0+ | rowspan=2| |- | β⁺ (22%) | ²⁰²At |-id=Radon-202m | style="text-indent:1em" | ^202mRn | | colspan="3" style="text-indent:2em" | 2310(50)#&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/86/202Rn-1.pdf 2002] | 2.22(7)&nbsp;μs | IT | ²⁰²Rn | 11−# | |-id=Radon-203 | rowspan=2|²⁰³Rn | rowspan=2| | rowspan=2 style="text-align:right" | 86 | rowspan=2 style="text-align:right" | 117 | rowspan=2|202.9933612(62) | rowspan=2 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/86/203.pdf 1967] | rowspan=2|44.2(16)&nbsp;s | α (66%) | ¹⁹⁹Po | rowspan=2|3/2− | rowspan=2| |- | β⁺ (34%) | ²⁰³At |-id=Radon-203m | rowspan=2 style="text-indent:1em" | ^203mRn | rowspan=2| | rowspan=2 colspan="3" style="text-indent:2em" | 362(4)&nbsp;keV | rowspan=2 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/86/203Rn-1.pdf 1967] | rowspan=2|26.9(5)&nbsp;s | α (75%) | ¹⁹⁹Po | rowspan=2|13/2+ | rowspan=2| |- | β⁺ (25%) | ²⁰³At |-id=Radon-204 | rowspan=2|²⁰⁴Rn | rowspan=2| | rowspan=2 style="text-align:right" | 86 | rowspan=2 style="text-align:right" | 118 | rowspan=2|203.9914437(80) | rowspan=2 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/86/204.pdf 1967] | rowspan=2|1.242(23)&nbsp;min | α (72.4%) | ²⁰⁰Po | rowspan=2|0+ | rowspan=2| |- | β⁺ (27.6%) | ²⁰⁴At |-id=Radon-205 | rowspan=2|²⁰⁵Rn | rowspan=2| | rowspan=2 style="text-align:right" | 86 | rowspan=2 style="text-align:right" | 119 | rowspan=2|204.9917232(55) | rowspan=2 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/86/205.pdf 1967] | rowspan=2|170(4)&nbsp;s | β⁺ (75.4%) | ²⁰⁵At | rowspan=2|5/2− | rowspan=2| |- | α (24.6%) | ²⁰¹Po |-id=Radon-205m | style="text-indent:1em" | ^205mRn | | colspan="3" style="text-indent:2em" | 657.1(5)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/86/205Rn-1.pdf 2010] | >10&nbsp;s | IT | ²⁰⁵Rn | 13/2+# | |-id=Radon-206 | rowspan=2|²⁰⁶Rn | rowspan=2| | rowspan=2 style="text-align:right" | 86 | rowspan=2 style="text-align:right" | 120 | rowspan=2|205.9901954(92) | rowspan=2 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/86/206.pdf 1954] | rowspan=2|5.67(17)&nbsp;min | α (62%) | ²⁰²Po | rowspan=2|0+ | rowspan=2| |- | β⁺ (38%) | ²⁰⁶At |-id=Radon-207 | rowspan=2|²⁰⁷Rn | rowspan=2| | rowspan=2 style="text-align:right" | 86 | rowspan=2 style="text-align:right" | 121 | rowspan=2|206.9907302(51) | rowspan=2 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/86/207.pdf 1954] | rowspan=2|9.25(17)&nbsp;min | β⁺ (79%) | ²⁰⁷At | rowspan=2|5/2− | rowspan=2| |- | α (21%) | ²⁰³Po |-id=Radon-207m | style="text-indent:1em" | ^207mRn | | colspan="3" style="text-indent:2em" | 899.1(10)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/86/207Rn-1.pdf 1974] | 184.5(9)&nbsp;μs | IT | ²⁰⁷Rn | 13/2+ | |-id=Radon-208 | rowspan=2|²⁰⁸Rn | rowspan=2| | rowspan=2 style="text-align:right" | 86 | rowspan=2 style="text-align:right" | 122 | rowspan=2|207.989635(11) | rowspan=2 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/86/208.pdf 1955] | rowspan=2|24.35(14)&nbsp;min | α (62%) | ²⁰⁴Po | rowspan=2|0+ | rowspan=2| |- | β⁺ (38%) | ²⁰⁸At |-id=Radon-208m | style="text-indent:1em" | ^208mRn | | colspan="3" style="text-indent:2em" | 1828.3(4)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/86/208Rn-1.pdf 1981] | 487(12)&nbsp;ns | IT | ²⁰⁸Rn | 8+ | |-id=Radon-209 | rowspan=2|²⁰⁹Rn | rowspan=2| | rowspan=2 style="text-align:right" | 86 | rowspan=2 style="text-align:right" | 123 | rowspan=2|208.990401(11) | rowspan=2 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/86/209.pdf 1952] | rowspan=2|28.8(10)&nbsp;min | β⁺ (83%) | ²⁰⁹At | rowspan=2|5/2− | rowspan=2| |- | α (17%) | ²⁰⁵Po |-id=Radon-209m1 | style="text-indent:1em" | ^209m1Rn | | colspan="3" style="text-indent:2em" | 1174.01(13)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/86/209Rn-1.pdf 1985] | 13.4(13)&nbsp;μs | IT | ²⁰⁹Rn | 13/2+ | |-id=Radon-209m2 | style="text-indent:1em" | ^209m2Rn | | colspan="3" style="text-indent:2em" | 3636.81(23)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/86/209Rn-2.pdf 1985] | 3.0(3)&nbsp;μs | IT | ²⁰⁹Rn | 35/2+ | |-id=Radon-210 | rowspan=2|²¹⁰Rn | rowspan=2| | rowspan=2 style="text-align:right" | 86 | rowspan=2 style="text-align:right" | 124 | rowspan=2|209.9896889(49) | rowspan=2 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/86/210.pdf 1952] | rowspan=2|2.4(1)&nbsp;h | α (96%) | ²⁰⁶Po | rowspan=2|0+ | rowspan=2| |- | β⁺ (4%) | ²¹⁰At |-id=Radon-210m1 | style="text-indent:1em" | ^210m1Rn | | colspan="3" style="text-indent:2em" | 1710(30)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/86/210Rn-3.pdf 1979] | 644(40)&nbsp;ns | IT | ²¹⁰Rn | 8+ | |-id=Radon-210m2 | style="text-indent:1em" | ^210m2Rn | | colspan="3" style="text-indent:2em" | 3857(30)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/86/210Rn-1.pdf 1979] | 1.06(5)&nbsp;μs | IT | ²¹⁰Rn | 17− | |-id=Radon-210m3 | style="text-indent:1em" | ^210m3Rn | | colspan="3" style="text-indent:2em" | 6514(30)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/86/210Rn-2.pdf 1979] | 1.04(7)&nbsp;μs | IT | ²¹⁰Rn | 23+ | |-id=Radon-211 | rowspan=2|²¹¹Rn | rowspan=2| | rowspan=2 style="text-align:right" | 86 | rowspan=2 style="text-align:right" | 125 | rowspan=2|210.9906008(73) | rowspan=2 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/86/211.pdf 1952] | rowspan=2|14.6(2)&nbsp;h | β⁺ (72.6%) | ²¹¹At | rowspan=2|1/2− | rowspan=2| |- | α (27.4%) | ²⁰⁷Po |-id=Radon-211m1 | style="text-indent:1em" | ^211m1Rn | | colspan="3" style="text-indent:2em" | 1603(14)#&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/86/211Rn-1.pdf 1981] | 596(28)&nbsp;ns | IT | ²¹¹Rn | 17/2− | |-id=Radon-211m2 | style="text-indent:1em" | ^211m2Rn | | colspan="3" style="text-indent:2em" | 8905(20)#&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/86/211Rn-2.pdf 1985] | 201(4)&nbsp;ns | IT | ²¹¹Rn | 63/2− | |-id=Radon-212 |²¹²Rn | |style="text-align:right" | 86 |style="text-align:right" | 126 |211.9907039(33) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/86/212.pdf 1950] |23.9(12)&nbsp;min | α | ²⁰⁸Po |0+ | |-id=Radon-212m1 | style="text-indent:1em" | ^212m1Rn | | colspan="3" style="text-indent:2em" | 1639.68(15)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/86/212Rn-3.pdf 1977] | 118(14)&nbsp;ns | IT | ²¹²Rn | 6+ | |-id=Radon-212m2 | style="text-indent:1em" | ^212m2Rn | | colspan="3" style="text-indent:2em" | 1694.1(3)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/86/212Rn-1.pdf 1975] | 910(30)&nbsp;ns | IT | ²¹²Rn | 8+ | |-id=Radon-212m3 | style="text-indent:1em" | ^212m3Rn | | colspan="3" style="text-indent:2em" | 6174.2(3)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/86/212Rn-4.pdf 1977] | 102(4)&nbsp;ns | IT | ²¹²Rn | 22+ | |-id=Radon-212m4 | style="text-indent:1em" | ^212m4Rn | | colspan="3" style="text-indent:2em" | 8579.2(4)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/86/212Rn-2.pdf 1977] | 154(14)&nbsp;ns | IT | ²¹²Rn | 30+ | |-id=Radon-213 | ²¹³Rn | | style="text-align:right" | 86 | style="text-align:right" | 127 | 212.9938851(36) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/86/213.pdf 1966] | 19.5(1)&nbsp;ms | α{{refn|group=n|Theoretically capable of electron capture to ²¹³At; the branching ratio is expected to be <5.8×10⁻⁴% (partial half-life >56 min)<ref>{{cite web|url=https://www.nndc.bnl.gov/ensnds/213/Rn/adopted.pdf|title=Adopted Levels for ²¹³Rn|publisher=NNDC Chart of Nuclides}}</ref>}} | ²⁰⁹Po | 9/2+# | |-id=Radon-213m1 | style="text-indent:1em" | ^213m1Rn | | colspan="3" style="text-indent:2em" | 1682(10)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/86/213Rn-2.pdf 1983] | 1.00(21)&nbsp;μs | IT | ²¹³Rn | (25/2+) | |-id=Radon-213m2 | style="text-indent:1em" | ^213m2Rn | | colspan="3" style="text-indent:2em" | 2205(10)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/86/213Rn-1.pdf 1983] | 1.36(7)&nbsp;μs | IT | ²¹³Rn | (31/2−) | |-id=Radon-213m3 | style="text-indent:1em" | ^213m3Rn | | colspan="3" style="text-indent:2em" | 5965(14)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/86/213Rn-3.pdf 1988] | 164(11)&nbsp;ns | IT | ²¹³Rn | (55/2+) | |-id=Radon-214 |²¹⁴Rn | | style="text-align:right" | 86 |style="text-align:right" | 128 |213.9953627(99) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/86/214.pdf 1970] |259(3)&nbsp;ns | α | ²¹⁰Po |0+ | |-id=Radon-214m | style="text-indent:1em" | ^214mRn | | colspan="3" style="text-indent:2em" | 4595.4(18)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/86/214Rn-1.pdf 1983] | 245(30)&nbsp;ns |IT |²¹⁴Rn | (22+) | |-id=Radon-215 | ²¹⁵Rn | | style="text-align:right" | 86 | style="text-align:right" | 129 | 214.9987450(65) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/86/215.pdf 1952] | 2.30(10)&nbsp;μs | α{{refn|group=n|Theoretically capable of electron capture to ²¹⁵At; the branching ratio is expected to be <1.0×10⁻¹¹% (partial half-life >266 d)<ref>{{cite web|url=https://www.nndc.bnl.gov/ensnds/215/Rn/adopted.pdf|title=Adopted Levels for ²¹⁵Rn|publisher=NNDC Chart of Nuclides}}</ref>}} | ²¹¹Po | 9/2+ | |-id=Radon-216 | ²¹⁶Rn | | style="text-align:right" | 86 | style="text-align:right" | 130 | 216.0002719(62) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/86/216.pdf 1949] | 29(4)&nbsp;μs | α | ²¹²Po | 0+ | |-id=Radon-217 | ²¹⁷Rn | | style="text-align:right" | 86 | style="text-align:right" | 131 | 217.0039276(45) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/86/217.pdf 1949] | 593(38)&nbsp;μs | α | ²¹³Po | 9/2+ | Trace<ref group=n name="ns">Intermediate decay product of ²³⁷Np</ref> |-id=Radon-218 | ²¹⁸Rn | | style="text-align:right" | 86 | style="text-align:right" | 132 | 218.0056011(25) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/86/218.pdf 1948] | 33.75(15)&nbsp;ms | α | ²¹⁴Po | 0+ | Trace<ref group="n" name="us">Intermediate decay product of ²³⁸U</ref> |-id=Radon-219 | ²¹⁹Rn | Actinon<br/>Actinium emanation | style="text-align:right" | 86 | style="text-align:right" | 133 | 219.0094787(23) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/86/219.pdf 1903] | 3.96(1)&nbsp;s | α{{refn|group=n|Theoretically capable of β⁻ decay to ²¹⁹Fr with a partial half-life calculated as ~1.3×10⁶ s (~15 d; branching ratio ~3.0×10⁻⁴%)<ref>{{cite journal |last1=Takahashi |first1=Kohji |last2=Yamada |first2=Masami |last3=Kondoh |first3=Takayoshi |title=Beta-decay half-lives calculated on the gross theory |journal=Atomic Data and Nuclear Data Tables |date=August 1973 |volume=12 |issue=1 |pages=101–142 |doi=10.1016/0092-640X(73)90015-6 |bibcode=1973ADNDT..12..101T }}</ref>}} | ²¹⁵Po | 5/2+ | Trace<ref group="n">Intermediate decay product of ²³⁵U</ref> |-id=Radon-220 |²²⁰Rn |Thoron<br/>Thorium emanation | style="text-align:right" | 86 | style="text-align:right" | 134 | 220.0113924(19) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/86/220.pdf 1900] |55.6(1)&nbsp;s | α<ref group="n">Theoretically capable of β⁻β⁻ decay to ²²⁰Ra</ref> | ²¹⁶Po |0+ |Trace<ref group="n">Intermediate decay product of ²³²Th</ref> |-id=Radon-221 | rowspan=2|²²¹Rn | rowspan=2| | rowspan=2 style="text-align:right" | 86 | rowspan=2 style="text-align:right" | 135 | rowspan=2|221.0155356(61) | rowspan=2 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/86/221.pdf 1956] | rowspan=2|25.7(5)&nbsp;min | β⁻ (78%) | ²²¹Fr | rowspan=2|7/2+ | rowspan=2|Trace<ref group="n" name="ns"/> |- | α (22%) | ²¹⁷Po |-id=Radon-222 | ²²²Rn<ref group="n">Most common isotope</ref> | Radon<ref group="n">Source of element's name</ref><br/>Radium emanation<br/>Emanation<br/>Emanon<br/>Niton | style="text-align:right" | 86 | style="text-align:right" | 136 | 222.0175760(21) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/86/222.pdf 1899] | 3.8215(2)&nbsp;d | α{{refn|group=n|Theoretically capable of β⁻β⁻ decay to ²²²Ra and perhaps β⁻ decay to ²²²Fr<ref name=BelliBaF2>{{cite journal |last1=Belli |first1=P. |last2=Bernabei |first2=R. |last3=Cappella |first3=C. |last4=Caracciolo |first4=V. |last5=Cerulli |first5=R. |last6=Danevich |first6=F.A. |last7=Di Marco |first7=A. |last8=Incicchitti |first8=A. |last9=Poda |first9=D.V. |last10=Polischuk |first10=O.G. |last11=Tretyak |first11=V.I. |title=Investigation of rare nuclear decays with BaF₂ crystal scintillator contaminated by radium |date=2014 |journal=European Physical Journal A |volume=50 |issue=9 |pages=134–143 |doi=10.1140/epja/i2014-14134-6 |arxiv=1407.5844|bibcode=2014EPJA...50..134B |s2cid=118513731 }}</ref>}} | ²¹⁸Po | 0+ | Trace<ref group="n" name="us" /> |-id=Radon-223 | ²²³Rn | | style="text-align:right" | 86 | style="text-align:right" | 137 | 223.0218893(84) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/86/223.pdf 1964] | 24.3(4)&nbsp;min | β⁻{{refn|group=n|Theoretically capable of α decay to ²¹⁹Po with a partial half-life of ~3.65×10⁸ s (~11.6 y; branching ratio ~4×10⁻⁴%)<ref>{{cite journal|last1=Sun |first1=Xiao-Dong |last2=Duan |first2=Chao |last3=Deng |first3=Jun-Gang |last4=Guo |first4=Ping |last5=Li |first5 = Xiao-Hua |title=Systematic study of α decay for odd-A nuclei within a two-potential approach |journal = Physical Review C | volume=95 | issue=1 | date=2017-01-18 | article-number=014319 |url=https://journals.aps.org/prc/abstract/10.1103/PhysRevC.95.014319 |doi=10.1103/PhysRevC.95.014319 |publisher=American Physical Society|arxiv=1903.07301 |bibcode=2017PhRvC..95a4319S }}</ref><ref>{{cite web|url=https://www.nndc.bnl.gov/ensnds/223/Rn/adopted.pdf|title=Adopted Levels for ²²³Rn|publisher=NNDC Chart of Nuclides}}</ref>}} | ²²³Fr | 7/2+ | |-id=Radon-224 | ²²⁴Rn | | style="text-align:right" | 86 | style="text-align:right" | 138 | 224.024096(11) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/86/224.pdf 1964] | 107(3)&nbsp;min | β⁻ | ²²⁴Fr | 0+ | |-id=Radon-225 | ²²⁵Rn | | style="text-align:right" | 86 | style="text-align:right" | 139 | 225.028486(12) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/86/225.pdf 1969] | 4.66(4)&nbsp;min | β⁻ | ²²⁵Fr | 7/2− | |-id=Radon-226 | ²²⁶Rn | | style="text-align:right" | 86 | style="text-align:right" | 140 | 226.030861(11) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/86/226.pdf 1969] | 7.4(1)&nbsp;min | β⁻ | ²²⁶Fr | 0+ | |-id=Radon-227 | ²²⁷Rn | | style="text-align:right" | 86 | style="text-align:right" | 141 | 227.035304(15) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/86/227.pdf 1986] | 20.2(4)&nbsp;s | β⁻ | ²²⁷Fr | (3/2+) | |-id=Radon-228 | ²²⁸Rn | | style="text-align:right" | 86 | style="text-align:right" | 142 | 228.037835(19) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/86/228.pdf 1989] | 65(2)&nbsp;s | β⁻ | ²²⁸Fr | 0+ | |-id=Radon-229 | ²²⁹Rn | | style="text-align:right" | 86 | style="text-align:right" | 143 | 229.042257(14) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/86/229.pdf 2009] | 11.9(13)&nbsp;s | β⁻ | ²²⁹Fr | (5/2+) | |-id=Radon-230 | ²³⁰Rn | | style="text-align:right" | 86 | style="text-align:right" | 144 | 230.04527(22)# | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/86/230.pdf 2010] | 24#&nbsp;s<br />[>300&nbsp;ns] | | | 0+ | |-id=Radon-231 | ²³¹Rn | | style="text-align:right" | 86 | style="text-align:right" | 145 | 231.04997(32)# | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/86/231.pdf 2010] | 2#&nbsp;s<br />[>300&nbsp;ns] | | | 1/2+# | |-id=Radon-232 | ²³²Rn | | style="text-align:right" | 86 | style="text-align:right" | 146 | | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/86/232.pdf (2010)] | | | | | {{Isotopes table/footer}}

== References == {{Reflist}} * Isotope masses from: **{{NUBASE 2003}} * Half-life, spin, and isomer data selected from the following sources. **{{NUBASE 2003}} **{{NNDC}} **{{CRC85|chapter=11}}

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Category:Isotopes of radon Category:Radon Radon