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Words starting with actiniums

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  • actinium — a radioactive element of the actinide series, occurring as a decay product of uranium. It is used as an alpha-particle source and in neutron production. Symbol: Ac; atomic no: 89; half-life of most stable isotope,227Ac: 21.6 years; relative density: 10.07; melting pt: 1051°C; boiling pt: 3200 ± 300°C
  • actinium series — a radioactive decay series that starts with uranium-235 and ends with lead-207
  • actinically — In an actinic manner.
  • actinides — Plural form of actinide.
  • actinic rays — light rays, esp. the violet and ultraviolet parts of the spectrum, that produce chemical changes, as in photography
  • actinia — any sea anemone of the genus Actinia, which are common in rock pools
  • actinian — belonging or pertaining to the order or suborder Actiniaria, comprising the sea anemones.
  • actinic — (of radiation) producing a photochemical effect