List of alpha-emitting nuclides

The following are among the principal radionuclides known to undergo alpha decay, emitting alpha particles.

• ²⁰⁹
  Bi, ²¹¹
  Bi, ²¹²
  Bi, ²¹³
  Bi
• ²¹⁰
  Po, ²¹¹
  Po, ²¹²
  Po, ²¹⁴
  Po, ²¹⁵
  Po, ²¹⁶
  Po, ²¹⁸
  Po
• ²¹⁵
  At, ²¹⁷
  At, ²¹⁸
  At
• ²¹⁸
  Rn, ²¹⁹
  Rn, ²²⁰
  Rn, ²²²
  Rn, ²²⁶
  Rn
• ²²¹
  Fr
• ²²³
  Ra, ²²⁴
  Ra, ²²⁶
  Ra
• ²²⁵
  Ac, ²²⁷
  Ac
• ²²⁷
  Th, ²²⁸
  Th, ²²⁹
  Th, ²³⁰
  Th, ²³²
  Th
• ²³¹
  Pa
• ²³³
  U, ²³⁴
  U, ²³⁵
  U, ²³⁶
  U, ²³⁸
  U
• ²³⁷
  Np
• ²³⁸
  Pu, ²³⁹
  Pu, ²⁴⁰
  Pu, ²⁴⁴
  Pu
• ²⁴¹
  Am
• ²⁴⁴
  Cm, ²⁴⁵
  Cm, ²⁴⁸
  Cm
• ²⁴⁹
  Cf, ²⁵²
  Cf