Atoms And Nuclei Question 362
Question: A radioactive nucleus undergoes a series of decay according to the scheme $ A\xrightarrow{a}A_{1}\xrightarrow{\beta }A_{2}\xrightarrow{\alpha }A_{3}\xrightarrow{\gamma }A_{4} $ If the mass number and atomic number of ‘A’ are 180 and 72 respectively, then what are these numbers for $ A_{4} $
Options:
A) 172 and 69
B) 174 and 70
C) 176 and 69
D) 176 and 70
Show Answer
Answer:
Correct Answer: A
Solution:
- $ _{72}A^{180} $
$\xrightarrow{{\alpha }_{70}}$
$ A_{1}^{176} $
$\xrightarrow{{\beta }_{71}}$
$ A_{2}^{176} $
$ {{\xrightarrow{\alpha }}{69}}A{3}^{172}{{\xrightarrow{\gamma }}{69}}A{4}^{172} $
