<P> Strontium - 90 ( 90 Sr ) is a radioactive isotope of strontium produced by nuclear fission , with a half - life of 28.8 years . It undergoes β decay into yttrium - 90 , with a decay energy of 0.546 MeV . Strontium - 90 has applications in medicine and industry and is an isotope of concern in fallout from nuclear weapons and nuclear accidents . </P>
<P> Strontium - 90 ( 90 Sr ) is a radioactive isotope of strontium produced by nuclear fission , with a half - life of 28.8 years . It undergoes β decay into yttrium - 90 , with a decay energy of 0.546 MeV . Strontium - 90 has applications in medicine and industry and is an isotope of concern in fallout from nuclear weapons and nuclear accidents . </P>
the element 90sr undergoes beta decay to form which isotope
the element 90sr undergoes beta decay to form which isotope
yttrium - 90
yttrium - 90