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SERCP$1128\mathrm{.}3.$P$\mathrm{.}009.$

Singly$-$ionized helium $(H{e}^{+})$is a hydrogen$-$like atom. Determine the energy in eV required to raise a $H{e}^{+}$electron from the $n=3$ to the $n=4$ energy level.

HINT

eV

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