What is the energy associated with the first orbit of $Li^{2+}$ $(R_{H} = 2.18 \times 10^{-18} \ J)$?
- A$-8.72 \times 10^{-18} \ J$
- B$-34.88 \times 10^{-18} \ J$
- C$-2.18 \times 10^{-18} \ J$
- D$-19.62 \times 10^{-18} \ J$
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