en
A group of 15 radioactive elements some of which occur naturally while others are produced in nuclear reactions. They include plutonium, americium and neptunium. The health hazard presented by the actinides, if they are released into the environment, comes from the potency of their radioactive characteristics. They are alpha-emitters, and therefore can cause intense localized damage in tissues if absorbed into the body.(Source: WRIGHT)
ia
Gruppo de 15 elementos radioactive, alcunes del quales occurre in natura ben que alteres es producite in reactiones nuclear. Illos include plutonium, americium e neptunium. Le periculo pro le sanitate presentate per le actinidos, si liberate in le ambiente, veni del potentia de lor characteristicas radioactive. Illos es alpha-emissores, e pote ergo causar grave damno local in texitos si absorbite in le corpore.