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Assertion (A) : The energy of $E_{1} (H) = E_{2} (H e^{+}) = E_{3} (L i^{+ 2})$
Reason (R) : The energy of orbit is $- \frac{13.6 \times n^{2}}{z^{2}}$ ev/atom

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Both A and R are true and R is explaining A.

Both A and R are true and R is not explaining A.

A is true, R is false.

A is false, R is true.

answer is A.

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Detailed Solution

$E = \frac{- 13.6 \times z^{2}}{n^{2}}$ eV/ atom.

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