²³³Bk — Unstable · t½ ≈ 21.0 min · Decay: β⁺ → ²³³Am · Type: synthetic · Uses: research.
²³⁴Bk — Unstable · t½ ≈ 24.0 min · Decay: β⁺ → ²³⁴Am · Type: synthetic · Uses: research.
²³⁵Bk — Unstable · t½ ≈ 22.0 min · Decay: β⁺ → ²³⁵Am · Type: synthetic · Uses: research.
²³⁶Bk — Unstable · t½ ≈ 22.0 min · Decay: β⁺ → ²³⁶Am · Type: synthetic · Uses: research.
²³⁷Bk — Unstable · t½ ≈ 1.2 min · Decay: β⁺ → ²³⁷Am · Type: synthetic · Uses: research.
²³⁸Bk — Unstable · t½ ≈ 2.4 min · Decay: β⁺ → ²³⁸Am · Type: synthetic · Uses: research.
²³⁹Bk — Unstable · t½ ≈ 5.0 min · Decay: β⁺ → ²³⁹Am · Type: synthetic · Uses: research.
²⁴⁰Bk — Unstable · t½ ≈ 4.8 min · Decay: β⁺ → ²⁴⁰Am · Type: synthetic · Uses: research.
²⁴¹Bk — Unstable · t½ ≈ 4.6 min · Decay: β⁺ → ²⁴¹Am · Type: synthetic · Uses: research.
²⁴²Bk — Unstable · t½ ≈ 7.0 min · Decay: β⁺ → ²⁴²Am · Type: synthetic · Uses: research.
²⁴³Bk — Unstable · t½ ≈ 4.6 h · Decay: β⁻ → ²⁴³Cf · Type: synthetic · Uses: research.
²⁴⁴Bk — Unstable · t½ ≈ 4.3 h · Decay: β⁻ → ²⁴⁴Cf · Type: synthetic · Uses: research.
²⁴⁵Bk — Unstable · t½ ≈ 4.9 d · Decay: β⁻ → ²⁴⁵Cf · Type: synthetic · Uses: research.
²⁴⁶Bk — Unstable · t½ ≈ 1.8 d · Decay: β⁻ → ²⁴⁶Cf · Type: synthetic · Uses: research.
²⁴⁷Bk — Unstable · t½ ≈ 1.4×10³ y · Decay: α → ²⁴³Am · Type: long-lived radionuclide · Uses: tracer, heavy element target.
²⁴⁸Bk — Unstable · t½ ≈ 9.3 y · Decay: β⁻ → ²⁴⁸Cf · Type: synthetic · Uses: research.
²⁴⁹Bk — Unstable · t½ ≈ 330 d · Decay: β⁻ → ²⁴⁹Cf · Type: synthetic · Uses: neutron capture experiments.
²⁵⁰Bk — Unstable · t½ ≈ 3.2 h · Decay: β⁻ → ²⁵⁰Cf · Type: synthetic · Uses: research.
²⁵¹Bk — Unstable · t½ ≈ 56.0 min · Decay: β⁻ → ²⁵¹Cf · Type: synthetic · Uses: research.
²⁵²Bk — Unstable · t½ ≈ 55.0 min · Decay: β⁻ → ²⁵²Cf · Type: synthetic · Uses: research.
²⁵³Bk — Unstable · t½ ≈ 13.0 h · Decay: β⁻ → ²⁵³Cf · Type: synthetic · Uses: research.
Berkelium — isotope count: 21 total · Stable: none · Unstable: 21.
(Data: IAEA LiveChart, NUBASE2020, ENSDF, Wikipedia “Isotopes of berkelium.” Notable applications: ²⁴⁷Bk as a long-lived tracer and target material for superheavy element synthesis.)