English mesothorium meaning in English  •  mesothorium का अर्थ अंग्रेजी में

Noun

• a radioactive isotope of radium (radium-228) with a half-life of 5.8 years. Also called mesothorium-1> or mesothorium I> to distinguish it from a subsequent decay product, mesothorium II (actinium-228). It was discovered in 1907 by Otto Hahn as a decay