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The excitation potential of hydrogen atom in the first excited state is
Options
(a) 13.6 V
(b) (-13.6 V)
(c) 10.2 V
(d) (-10 V)
Correct Answer:
10.2 V
Explanation:
Energy of electron in ground state of hydrogen atom,
E₁ = -1.36 eV [E(n) = (-13.6 / n²) eV]
Energy of electron in first excited state of hydrogen atom,
E₂ = -13.6 / 2² = – 3.4 eV
Hence, the excitation energy of hydrogen atom in first excited state,
E = E₂ – E₁ = – 3.4 – (-13.6) = 10.2 eV
Therefore, excitation potential is 10.2 V.
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Two bodies A and B have masses 20 Kg and 5 Kg respectively. Each one is acted
- Penetrating power of X-rays does not depend on
- If voltage across a bulb rated 220 volt-100 Watt drops by 2.5% of its rated value
- Dispersion of light is caused due to
- A beaker of radius 1.5 cm is filled with a liquid of surface tension 0.075 N/m
Topics: Atoms and Nuclei (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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