Question 209 of 239
Assume that a neutron breaks into a proton and an electron. The energy released during this process is (Mass of neutron mass of proton mass of electron
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Answer: (A)
$\begin{aligned}
\Delta m & =\left(m_p+m_e\right)-m_n \\
& =9 \times 10^{-31} \mathrm{~kg}.
\end{aligned}$
Energy released joules
$\begin{aligned}
& =\frac{9 \times 10^{-31} \times\left(3 \times 10^8\right)^2}{1.6 \times 10^{-13}} \mathrm{MeV} \\
& =0.73 \mathrm{~MeV} .
\end{aligned}$
\Delta m & =\left(m_p+m_e\right)-m_n \\
& =9 \times 10^{-31} \mathrm{~kg}.
\end{aligned}$
Energy released joules
$\begin{aligned}
& =\frac{9 \times 10^{-31} \times\left(3 \times 10^8\right)^2}{1.6 \times 10^{-13}} \mathrm{MeV} \\
& =0.73 \mathrm{~MeV} .
\end{aligned}$