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The total energy of electron in the ground state of hydrogen atom is -13.6 eV. The kinetic energy of an electron in the first excited state is
Options
(a) 6.8 eV
(b) 13.6 eV
(c) 1.7 eV
(d) 3.4 eV
Correct Answer:
3.4 eV
Explanation:
Energy in the first excited state
= – 13.6 / n² = – 13.6 / 2² = – 3.4 eV
But K.E. = – (Total energy) = +3.4 eV.
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Topics: Atoms and Nuclei
(136)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Two planets at mean distances d₁ and d₂ from the sun have their frequencies n₁ and n₂
- The time period of a mass suspended from a spring is T. If the spring is cut into four
- Two point objects of masses 1.5 g and 2.5 g respectively are at a distance of 16 cm
- Pick out the statement ehich is incorrect?
- A ball is projected upwards from the foot of a tower. The ball crosses the top
Topics: Atoms and Nuclei (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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