Polonium (Z = 84, A = 186–227)

¹⁸⁶Po — Unstable · t½ ≈ 2.0 ms · Decay: α → ¹⁸²Pb · Type: synthetic · Uses: research.
¹⁸⁷Po — Unstable · t½ ≈ 5.0 ms · Decay: α → ¹⁸³Pb · Type: synthetic · Uses: research.
¹⁸⁸Po — Unstable · t½ ≈ 9.0 ms · Decay: α → ¹⁸⁴Pb · Type: synthetic · Uses: research.
¹⁸⁹Po — Unstable · t½ ≈ 18.0 ms · Decay: α → ¹⁸⁵Pb · Type: synthetic · Uses: research.
¹⁹⁰Po — Unstable · t½ ≈ 30.0 ms · Decay: α → ¹⁸⁶Pb · Type: synthetic · Uses: research.
¹⁹¹Po — Unstable · t½ ≈ 0.3 s · Decay: α → ¹⁸⁷Pb · Type: synthetic · Uses: research.
¹⁹²Po — Unstable · t½ ≈ 0.5 s · Decay: α → ¹⁸⁸Pb · Type: synthetic · Uses: research.
¹⁹³Po — Unstable · t½ ≈ 1.0 s · Decay: α → ¹⁸⁹Pb · Type: synthetic · Uses: research.
¹⁹⁴Po — Unstable · t½ ≈ 1.5 s · Decay: α → ¹⁹⁰Pb · Type: synthetic · Uses: research.
¹⁹⁵Po — Unstable · t½ ≈ 4.5 s · Decay: α → ¹⁹¹Pb · Type: synthetic · Uses: research.
¹⁹⁶Po — Unstable · t½ ≈ 5.5 s · Decay: α → ¹⁹²Pb · Type: synthetic · Uses: research.
¹⁹⁷Po — Unstable · t½ ≈ 7.2 s · Decay: α → ¹⁹³Pb · Type: synthetic · Uses: research.
¹⁹⁸Po — Unstable · t½ ≈ 13.0 s · Decay: α → ¹⁹⁴Pb · Type: synthetic · Uses: research.
¹⁹⁹Po — Unstable · t½ ≈ 15.5 s · Decay: α → ¹⁹⁵Pb · Type: synthetic · Uses: research.
²⁰⁰Po — Unstable · t½ ≈ 11.5 s · Decay: α → ¹⁹⁶Pb · Type: synthetic · Uses: research.
²⁰¹Po — Unstable · t½ ≈ 15.0 s · Decay: α → ¹⁹⁷Pb · Type: synthetic · Uses: research.
²⁰²Po — Unstable · t½ ≈ 44.0 s · Decay: α → ¹⁹⁸Pb · Type: synthetic · Uses: research.
²⁰³Po — Unstable · t½ ≈ 36.0 s · Decay: α → ¹⁹⁹Pb · Type: synthetic · Uses: research.
²⁰⁴Po — Unstable · t½ ≈ 3.5 min · Decay: α → ²⁰⁰Pb · Type: synthetic · Uses: research.
²⁰⁵Po — Unstable · t½ ≈ 5.5 min · Decay: α → ²⁰¹Pb · Type: synthetic · Uses: research.
²⁰⁶Po — Unstable · t½ ≈ 8.8 d · Decay: α → ²⁰²Pb · Type: tracer · Uses: nuclear science.
²⁰⁷Po — Unstable · t½ ≈ 5.8 h · Decay: α → ²⁰³Pb · Type: tracer · Uses: nuclear science.
²⁰⁸Po — Unstable · t½ ≈ 2.9 y · Decay: α → ²⁰⁴Pb · Type: activation product · Uses: tracer.
²⁰⁹Po — Unstable · t½ ≈ 103 y · Decay: α → ²⁰⁵Pb · Type: tracer · Uses: long-lived nuclear tracer.
²¹⁰Po — Unstable · t½ ≈ 138 d · Decay: α → ²⁰⁶Pb · Type: environmental radionuclide · Uses: heat source in space power (RTGs), toxicological studies.
²¹¹Po — Unstable · t½ ≈ 0.5 s · Decay: α → ²⁰⁷Pb · Type: natural (Uranium series) · Uses: research.
²¹²Po — Unstable · t½ ≈ 0.3 μs · Decay: α → ²⁰⁸Pb · Type: natural (Thorium series) · Uses: research.
²¹³Po — Unstable · t½ ≈ 3.7 μs · Decay: α → ²⁰⁹Pb · Type: natural (Actinium series) · Uses: research.
²¹⁴Po — Unstable · t½ ≈ 164 μs · Decay: α → ²¹⁰Pb · Type: natural (Uranium series) · Uses: tracer.
²¹⁵Po — Unstable · t½ ≈ 1.8 ms · Decay: α → ²¹¹Pb · Type: natural (Uranium series) · Uses: tracer.
²¹⁶Po — Unstable · t½ ≈ 150 ms · Decay: α → ²¹²Pb · Type: natural (Thorium series) · Uses: tracer.
²¹⁷Po — Unstable · t½ ≈ 1.5 s · Decay: α → ²¹³Pb · Type: synthetic · Uses: research.
²¹⁸Po — Unstable · t½ ≈ 3.1 min · Decay: α → ²¹⁴Pb · Type: natural (Uranium series) · Uses: tracer, environmental studies.
²¹⁹Po — Unstable · t½ ≈ 10.0 ms · Decay: α → ²¹⁵Pb · Type: synthetic · Uses: research.
²²⁰Po — Unstable · t½ ≈ 30.0 ms · Decay: α → ²¹⁶Pb · Type: synthetic · Uses: research.
²²¹Po — Unstable · t½ ≈ 0.5 s · Decay: α → ²¹⁷Pb · Type: synthetic · Uses: research.
²²²Po — Unstable · t½ ≈ 0.7 s · Decay: α → ²¹⁸Pb · Type: synthetic · Uses: research.
²²³Po — Unstable · t½ ≈ 0.6 s · Decay: α → ²¹⁹Pb · Type: synthetic · Uses: research.
²²⁴Po — Unstable · t½ ≈ 1.0 s · Decay: α → ²²⁰Pb · Type: synthetic · Uses: research.
²²⁵Po — Unstable · t½ ≈ 1.8 s · Decay: α → ²²¹Pb · Type: synthetic · Uses: research.
²²⁶Po — Unstable · t½ ≈ 1.2 s · Decay: α → ²²²Pb · Type: synthetic · Uses: research.
²²⁷Po — Unstable · t½ ≈ 0.3 s · Decay: α → ²²³Pb · Type: synthetic · Uses: research.

Polonium — isotope count: 42 total · Stable: none · Unstable: 42.
(Data: IAEA LiveChart, NUBASE2020, ENSDF; notable applications: ²¹⁰Po in RTGs and toxicology, short-lived Po isotopes in decay series studies, tracers in environmental monitoring.)

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