JEE CHEMISTRY MCQ: STRUCTURE OF ATOM

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Understanding +4 | -1

The mass defect of the nuclear reaction:

{ }_5 {B}^8 \rightarrow{ }_4 {Be}^8+{e}^{+}

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Correct option: D

{m}=

At. mass of

{ }_5 {B}^8-

At. mass of

{ }_4 {Be}^8+

mass of two electron

Option D (

{m}=

At. mass of

{ }_5 {B}^8-

At. mass of

{ }_4 {Be}^8+

mass of two electron) is correct because the mass defect calculation must account for the positron emission, which effectively removes an electron mass from the product.

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