actinon lietuviškai

Paaiškinimas anglų kalba

• any of a series of radioactive elements with atomic numbers 89 through 103
• Radon. A naturally radioactive element with atomic symbol Rn, atomic number 86, and atomic weight 222. It is a member of the noble gas family and released during the decay of radium and found in soil. There is a link between exposure to radon and lung cancer.