Radiothorium - Definition - Law Dictionary Home Dictionary Definition radiothorium

Definition :

an earlier name for the thorium isotope thorium 228 given by its discoverer Otto Hahn It is a radioactive substance formed as one of series of products in the chain of radioactive decay of thorium Its immediate predecessor in the chain is Actinium 228 and it decays by alpha emission to radium 224 with a half life of 191 years The name radiothorium was given prior to the full understanding of the nature of isotopes of elements