Question

An isotope of ..Una decays into thorum (Thl bythe emission to an alpha-partic
The nucleus of thorium then decay into Protactinium (Pa) by the emission of
beta particle. Write two nuclear equations to illustrate the above changes
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Answer 1

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Many nuclei are radioactive; that is, they decompose by emitting particles or rays and in doing so, become a different nucleus. In our studies up to this point, atoms of one element were unable to change into different elements. That is because in all other types of changes we have talked about only the electrons were changing. In these changes, the nucleus, which contains the protons which dictate which element an atom is, is changing. All nuclei with 84 or more protons are radioactive and elements with less than 84 protons have both stable and unstable isotopes. All of these elements can go through nuclear changes and turn into different elements.