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Consider the follwing nuclear reactions:...

Consider the follwing nuclear reactions:
`._(92)^(238) M rarr ._(y)^(x)N + 2 ._(2)He^(4)`
`._(y)^(x)N rarr ._(B)^(A)L + 2beta^(+)`

A

142

B

144

C

140

D

146

Text Solution

Verified by Experts

The correct Answer is:
B
`._(92)^(238)M rarr _(Y)^(X)N+2._(2)^(4)He`
Applying mass number balance & nuclear charge balance
92=y+4 `" "` y=88
238=x+8 ` " "` x=230
`._(Y)^(X)N rarr _(B) ^(A) L+2 beta^(+) (._(+1)e^(0))`
Applying mass number balance & nuclear charge balance
230=A+0 `" "` A=230
88=B+2 ` " " ` B=86
No. of neutrons in element L is 230-86=144.
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