| (1) $1.632\times10^{-18}$ | (2) $3.176\times10^{-18}$ | (3) $4.72\times10^{-19}$ | (4) $5.44\times10^{-19}$ |
\textbf{175.} The electron in the hydrogen atom is in the ground state. The energy required for the electron to jump from the ground state to the first excited state is how many joules?
$$(e = 1.6\times10^{-19}\ \text{C},\quad E_R = 13.6\ \text{eV})$$
\begin{tabular}{llll}
(1) $1.632\times10^{-18}$ & (2) $3.176\times10^{-18}$ & (3) $4.72\times10^{-19}$ & (4) $5.44\times10^{-19}$
\end{tabular}
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