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A nuclear transformation is denoted by X...

A nuclear transformation is denoted by `X(n,alpha) rarr. _(3)^(7)Li`. Which of the following is the nucleus of element `X`

A

`._(6)^(12)C`

B

`._(5)^(10)B`

C

`._(5)^(9)B`

D

`._(4)^(11)Be`

Text Solution

Verified by Experts

The correct Answer is:
B
`X (n, alpha) rarr ._(3)^(7)Li`
`._(0)^(1)n + ._(Z)^(A)X rarr ._(3)^(7)Li + ._(2)^(4)He`
On conservating atomic number and mass number on both sides, we get
`A = (7 + 4) - 1 = 10`
`Z = (3 + 2) - 0 = 5`
Hence, `._(Z)^(A)X = ._(5)^(10)B`
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