NEET UG CHEMISTRY MCQ: STRUCTURE OF ATOM

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The mass defect of the nuclear reaction:

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

View answer and explanation

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 includes the mass of the positron emitted, which accounts for the difference in nuclear charge and requires adding two electron masses to balance the equation.

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