A) 7
B) 10
C) 14
D) 9
Correct Answer: D
Solution :
The atomic number of radioactive element increases by one by the emission of 1 \[\beta -\]particle. Hence, after the emission of\[2\beta -\]particles, there will be an increase of 2 units in atomic number. Hence, \[_{5}{{X}^{14}}{{\xrightarrow[{}]{-2\beta \,particle}}_{7}}{{N}^{14}}\] Hence, the number of neutrons in parent element\[(X)=14-5=9\]You need to login to perform this action.
You will be redirected in
3 sec