NEET Physics Nuclear Physics And Radioactivity NEET PYQ-Nuclear Physics

The number of beta particles emitted by a radioactive substance is twice the number of alpha particles emitted by it. The resulting daughter is an                   [AIPMT (S) 2009]

A) isobar of parent

B)      isomer of parent

C) isotone of parent

D)      isotope of parent

Correct Answer: D

Solution :

Let, the radioactive substance be \[_{Z}^{A}X\]

Radioactive transition is given by

\[_{Z}^{A}X\xrightarrow{-\alpha }_{Z-2}^{A-4}X\xrightarrow{-2\beta }\,_{Z}^{A-4}X\]

The atoms of element having same atomic number but different mass numbers are called isotopes.

So, \[_{Z}^{A}X\] and \[_{Z}^{A-4}X\] are isotopes.