A) 142
B) 144
C) 140
D) 146
Correct Answer: B
Solution :
\[_{92}^{238}M\xrightarrow[{}]{{}}_{Y}^{X}N+2_{2}^{4}He\] \[X=230\] \[Y=88\] \[_{88}^{230}N\xrightarrow[{}]{{}}_{B}^{A}L+2_{1}^{0}e({{\beta }^{+}})\] \[\therefore \] \[A=230\] \[=n+p\] \[\therefore \] \[B=86=p\] \[\therefore \] \[n=144\]You need to login to perform this action.
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