Question

$M_x$ and $M_y$ denote the atomic masses of the parent and the daughter nuclei respectively in a radioactive decay. The $Q$-value of a $\beta^{-}$decay is $Q_1$ and that for a $\beta^{+}$decay is $Q_2$. If $m_e$ denotes the mass of an electron, then which of the following statement is correct?

Accepted Answer

$Q_1=\left(M_x-M_y\right) c^2$ and $Q_2=\left(M_x-M_y-2 m_e\right) c^2$

Answer

$Q_1=\left(M_x-M_y\right) c^2$ and $Q_2=\left(M_x-M_y\right) c^2$

Answer

$Q_1=\left(M_x-M_y-2 m_e\right) c^2$ and $Q_2=\left(M_x-M_y+2 m_e\right) c^2$

Answer

$Q_1=\left(M_x-M_y+2 m_e\right) c^2$ and $Q_2=\left(M_x-M_y+2 m_e\right) c^2$

JEE PHYSICS MCQ: NUCLEI

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