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The ground and first excited state energies are E₁ and E₂ respectively. Which pair of species has same energy ? [Note that energy is indicated in the bracket].

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H(E₁), Li²⁺(E₂)

He⁺(E1₎, Be³⁺(E₂)

He⁺(E₁), Li²⁺(E₂)

H(E₂), Be³⁺(E₁)

answer is B.

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Detailed Solution

$E = - 13.6 \frac{n^{2}}{Z^{2}} E α - \frac{n^{2}}{Z^{2}}$

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