⁸⁵Tc — Unstable · t½ ≈ 5.0 s · Decay: β⁺ → ⁸⁵Mo · Type: synthetic · Uses: research.
⁸⁶Tc — Unstable · t½ ≈ 5.0 s · Decay: β⁺ → ⁸⁶Mo · Type: synthetic · Uses: research.
⁸⁷Tc — Unstable · t½ ≈ 2.8 s · Decay: β⁺ → ⁸⁷Mo · Type: synthetic · Uses: research.
⁸⁸Tc — Unstable · t½ ≈ 5.8 s · Decay: β⁺ → ⁸⁸Mo · Type: synthetic · Uses: research.
⁸⁹Tc — Unstable · t½ ≈ 12.8 s · Decay: β⁺ → ⁸⁹Mo · Type: synthetic · Uses: research.
⁹⁰Tc — Unstable · t½ ≈ 8.7 s · Decay: β⁺ → ⁹⁰Mo · Type: synthetic · Uses: research.
⁹¹Tc — Unstable · t½ ≈ 3.1 min · Decay: β⁺ → ⁹¹Mo · Type: synthetic · Uses: research.
⁹²Tc — Unstable · t½ ≈ 4.25 min · Decay: β⁺ → ⁹²Mo · Type: synthetic · Uses: research.
⁹³Tc — Unstable · t½ ≈ 2.75 h · Decay: β⁻ → ⁹³Ru · Type: fission product · Uses: research.
⁹⁴Tc — Unstable · t½ ≈ 4.9 h · Decay: β⁻ → ⁹⁴Ru · Type: fission product · Uses: tracer.
⁹⁵Tc — Unstable · t½ ≈ 20 h · Decay: β⁻ → ⁹⁵Ru · Type: activation product · Uses: tracer.
⁹⁶Tc — Unstable · t½ ≈ 4.3 d · Decay: β⁻ → ⁹⁶Ru · Type: activation product · Uses: tracer.
⁹⁷Tc — Unstable · t½ ≈ 2.6 Myr · Decay: β⁻ → ⁹⁷Ru · Type: primordial long-lived · Uses: cosmochemistry.
⁹⁸Tc — Unstable · t½ ≈ 4.2 Myr · Decay: β⁻ → ⁹⁸Ru · Type: primordial long-lived · Uses: cosmochemistry.
⁹⁹Tc — Unstable · t½ ≈ 2.1×10⁵ y · Decay: β⁻ → ⁹⁹Ru · Type: fission product · Uses: nuclear waste monitoring.
⁹⁹ᵐTc — Unstable (metastable) · t½ ≈ 6.0 h · Decay: IT (γ) → ⁹⁹Tc · Type: medical isotope · Uses: workhorse of nuclear medicine imaging (80% of all scans).
¹⁰⁰Tc — Unstable · t½ ≈ 15.8 s · Decay: β⁻ → ¹⁰⁰Ru · Type: synthetic · Uses: research.
¹⁰¹Tc — Unstable · t½ ≈ 14.2 min · Decay: β⁻ → ¹⁰¹Ru · Type: fission product · Uses: research.
¹⁰²Tc — Unstable · t½ ≈ 5.3 s · Decay: β⁻ → ¹⁰²Ru · Type: synthetic · Uses: research.
¹⁰³Tc — Unstable · t½ ≈ 54.2 s · Decay: β⁻ → ¹⁰³Ru · Type: synthetic · Uses: research.
¹⁰⁴Tc — Unstable · t½ ≈ 18.3 s · Decay: β⁻ → ¹⁰⁴Ru · Type: synthetic · Uses: research.
¹⁰⁵Tc — Unstable · t½ ≈ 7.6 s · Decay: β⁻ → ¹⁰⁵Ru · Type: synthetic · Uses: research.
¹⁰⁶Tc — Unstable · t½ ≈ 4.3 s · Decay: β⁻ → ¹⁰⁶Ru · Type: synthetic · Uses: research.
¹⁰⁷Tc — Unstable · t½ ≈ 2.1 s · Decay: β⁻ → ¹⁰⁷Ru · Type: synthetic · Uses: research.
¹⁰⁸Tc — Unstable · t½ ≈ 5.2 s · Decay: β⁻ → ¹⁰⁸Ru · Type: synthetic · Uses: research.
¹⁰⁹Tc — Unstable · t½ ≈ 0.9 s · Decay: β⁻ → ¹⁰⁹Ru · Type: synthetic · Uses: research.
¹¹⁰Tc — Unstable · t½ ≈ 0.9 s · Decay: β⁻ → ¹¹⁰Ru · Type: synthetic · Uses: research.
¹¹¹Tc — Unstable · t½ ≈ 0.3 s · Decay: β⁻ → ¹¹¹Ru · Type: synthetic · Uses: research.
¹¹²Tc — Unstable · t½ ≈ 0.3 s · Decay: β⁻ → ¹¹²Ru · Type: synthetic · Uses: research.
¹¹³Tc — Unstable · t½ ≈ 0.2 s · Decay: β⁻ → ¹¹³Ru · Type: synthetic · Uses: research.
¹¹⁴Tc — Unstable · t½ ≈ 0.2 s · Decay: β⁻ → ¹¹⁴Ru · Type: synthetic · Uses: research.
¹¹⁵Tc — Unstable · t½ ≈ 0.15 s · Decay: β⁻ → ¹¹⁵Ru · Type: synthetic · Uses: research.
¹¹⁶Tc — Unstable · t½ ≈ 0.1 s · Decay: β⁻ → ¹¹⁶Ru · Type: synthetic · Uses: research.
¹¹⁷Tc — Unstable · t½ ≈ 0.08 s · Decay: β⁻ → ¹¹⁷Ru · Type: synthetic · Uses: research.
¹¹⁸Tc — Unstable · t½ ≈ 0.07 s · Decay: β⁻ → ¹¹⁸Ru · Type: synthetic · Uses: research.
¹¹⁹Tc — Unstable · t½ ≈ 0.06 s · Decay: β⁻ → ¹¹⁹Ru · Type: synthetic · Uses: research.
¹²⁰Tc — Unstable · t½ ≈ 0.05 s · Decay: β⁻ → ¹²⁰Ru · Type: synthetic · Uses: research.
Technetium — isotope count: 36 total · Stable: 0 (all radioactive) · Long-lived: ⁹⁷Tc, ⁹⁸Tc, ⁹⁹Tc.
(Data: IAEA LiveChart, NUBASE2020, ENSDF; ⁹⁹ᵐTc is the single most used medical isotope worldwide, others relevant in cosmochemistry and waste management.)
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