Atoms And Nuclei Question 195
Question: In nuclear reaction $ _{2}He^{4}+ _{z}X^{A}\to _{z+2}{{Y}^{A+3}}+A,\ A $ denotes [CPMT 1997]
Options:
A) Electron
B) Positron
C) Proton
D) Neutron
Show Answer
Answer:
Correct Answer: D
Solution:
The given equation is $ _{2}He^{4}+ _{z}X^{A}\to _{z+2}Y^{A+3}+A $ Applying charge and mass conservation $ 4+A=A+3+x\Rightarrow x=1 $
Þ $ 2+z=z+2+n\Rightarrow n=0 $ Hence A is a neutron.
