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Which hydrogen-like species would emit a photon with a wavelength of 11.4 nm if an electron transitions from the $n=3$ state to the $n=1$ state?

Note:

  • $R=1.097\times {10}^{7}{\text{ m}}^{-1}$
A

${He}^{+}$

B

${Li}^{2+}$

C

${Be}^{3+}$

D

${B}^{4+}$

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