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A hydrogen like single electron species has ground state binding energy 122.4eV then correct statement is/are

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Its atomic number is 3

A photon of 90 eV can excite it to higher state

A 80 eV photon can not excite it to a higher state electron

To excite an minimum 91.8eV photon is required.

answer is A, C, D.

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Detailed Solution

$122 .4 = \frac{13 .6 \times Z^{2}}{n^{2}} ∴ Z = 3$
Minimum energy for excitation $\to$ 91.8 eV

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