Question

(a) An element _zS^A decays to _SSR ²²² after emitting 2 alpha particles and 1 beta particle. Find the atomic number and atomic mass of the element S. 

(b) A radioactive substance is oxidized. Will there be any change in the nature its radioactivity? Give a reason for your answer.

Answer 1

(a) The decay will follow the following sequence

 

Therefore, we have 

Z – 3 = 85 or Z = 85+ 3 = 88 

And A- 8 = 222 or A = 222 + 8 = 230 Z = 88, A = 230 

(b) Radioactivity is the nuclear phenomenon, i.e., radioactive radiation are emitted from the nucleus of the radioactive substance, so any physical change like oxidation or any chemical change does not affect its nature of radioactivity.