¹⁹³Rn — Unstable · t½ ≈ 1.0 ms · Decay: α → ¹⁸⁹Po · Type: synthetic · Uses: research.
¹⁹⁴Rn — Unstable · t½ ≈ 2.0 ms · Decay: α → ¹⁹⁰Po · Type: synthetic · Uses: research.
¹⁹⁵Rn — Unstable · t½ ≈ 5.0 ms · Decay: α → ¹⁹¹Po · Type: synthetic · Uses: research.
¹⁹⁶Rn — Unstable · t½ ≈ 8.0 ms · Decay: α → ¹⁹²Po · Type: synthetic · Uses: research.
¹⁹⁷Rn — Unstable · t½ ≈ 20.0 ms · Decay: α → ¹⁹³Po · Type: synthetic · Uses: research.
¹⁹⁸Rn — Unstable · t½ ≈ 40.0 ms · Decay: α → ¹⁹⁴Po · Type: synthetic · Uses: research.
¹⁹⁹Rn — Unstable · t½ ≈ 100 ms · Decay: α → ¹⁹⁵Po · Type: synthetic · Uses: research.
²⁰⁰Rn — Unstable · t½ ≈ 0.3 s · Decay: α → ¹⁹⁶Po · Type: synthetic · Uses: research.
²⁰¹Rn — Unstable · t½ ≈ 0.5 s · Decay: α → ¹⁹⁷Po · Type: synthetic · Uses: research.
²⁰²Rn — Unstable · t½ ≈ 0.9 s · Decay: α → ¹⁹⁸Po · Type: synthetic · Uses: research.
²⁰³Rn — Unstable · t½ ≈ 2.0 s · Decay: α → ¹⁹⁹Po · Type: synthetic · Uses: research.
²⁰⁴Rn — Unstable · t½ ≈ 3.0 s · Decay: α → ²⁰⁰Po · Type: synthetic · Uses: research.
²⁰⁵Rn — Unstable · t½ ≈ 5.0 s · Decay: α → ²⁰¹Po · Type: synthetic · Uses: research.
²⁰⁶Rn — Unstable · t½ ≈ 5.0 s · Decay: α → ²⁰²Po · Type: synthetic · Uses: research.
²⁰⁷Rn — Unstable · t½ ≈ 9.0 s · Decay: α → ²⁰³Po · Type: synthetic · Uses: research.
²⁰⁸Rn — Unstable · t½ ≈ 24.0 s · Decay: α → ²⁰⁴Po · Type: synthetic · Uses: research.
²⁰⁹Rn — Unstable · t½ ≈ 28.0 s · Decay: α → ²⁰⁵Po · Type: synthetic · Uses: research.
²¹⁰Rn — Unstable · t½ ≈ 2.4 h · Decay: α → ²⁰⁶Po · Type: tracer · Uses: nuclear research.
²¹¹Rn — Unstable · t½ ≈ 14.6 h · Decay: α → ²⁰⁷Po · Type: tracer · Uses: research.
²¹²Rn — Unstable · t½ ≈ 24.0 min · Decay: α → ²⁰⁸Po · Type: natural (Thorium series) · Uses: tracer.
²¹³Rn — Unstable · t½ ≈ 19.5 ms · Decay: α → ²⁰⁹Po · Type: synthetic · Uses: research.
²¹⁴Rn — Unstable · t½ ≈ 270 ms · Decay: α → ²¹⁰Po · Type: synthetic · Uses: research.
²¹⁵Rn — Unstable · t½ ≈ 1.6 ms · Decay: α → ²¹¹Po · Type: synthetic · Uses: research.
²¹⁶Rn — Unstable · t½ ≈ 45.0 s · Decay: α → ²¹²Po · Type: natural (Thorium series) · Uses: tracer.
²¹⁷Rn — Unstable · t½ ≈ 54.0 s · Decay: α → ²¹³Po · Type: natural (Actinium series) · Uses: tracer.
²¹⁸Rn — Unstable · t½ ≈ 35.0 ms · Decay: α → ²¹⁴Po · Type: natural (Uranium series, radon gas) · Uses: environmental tracer, health physics.
²¹⁹Rn — Unstable · t½ ≈ 4.0 s · Decay: α → ²¹⁵Po · Type: natural (Actinium series) · Uses: tracer.
²²⁰Rn — Unstable · t½ ≈ 55.6 s · Decay: α → ²¹⁶Po · Type: natural (Thorium series, “thoron”) · Uses: environmental tracer.
²²¹Rn — Unstable · t½ ≈ 25.0 min · Decay: α → ²¹⁷Po · Type: natural (Actinium series) · Uses: tracer.
²²²Rn — Unstable · t½ ≈ 3.82 d · Decay: α → ²¹⁸Po · Type: natural (Uranium series, most stable isotope) · Uses: radiological hazard, environmental studies.
²²³Rn — Unstable · t½ ≈ 24.3 min · Decay: α → ²¹⁹Po · Type: natural (Actinium series) · Uses: tracer.
²²⁴Rn — Unstable · t½ ≈ 107 s · Decay: α → ²²⁰Po · Type: natural (Thorium series) · Uses: tracer.
²²⁵Rn — Unstable · t½ ≈ 4.0 min · Decay: α → ²²¹Po · Type: synthetic · Uses: research.
²²⁶Rn — Unstable · t½ ≈ 7.5 min · Decay: α → ²²²Po · Type: synthetic · Uses: research.
²²⁷Rn — Unstable · t½ ≈ 20.0 min · Decay: α → ²²³Po · Type: synthetic · Uses: research.
²²⁸Rn — Unstable · t½ ≈ 60.0 min · Decay: α → ²²⁴Po · Type: synthetic · Uses: research.
²²⁹Rn — Unstable · t½ ≈ 6.0 min · Decay: α → ²²⁵Po · Type: synthetic · Uses: research.
²³⁰Rn — Unstable · t½ ≈ 1.0 min · Decay: α → ²²⁶Po · Type: synthetic · Uses: research.
Radon — isotope count: 38 total · Stable: none · Unstable: 38.
(Data: IAEA LiveChart, NUBASE2020, ENSDF; notable applications: ²²²Rn in environmental monitoring and health physics, thoron (²²⁰Rn) and actinon (²¹⁹Rn) in tracer studies.)
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