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The energy of a hydrogen atom in the ground state is -13.6 eV. The energy of a He⁺ ion in the first excited state will be
Options
(a) – 13.6 eV
(b) – 27.7 eV
(c) – 54.4 eV
(d) – 6.8 eV
Correct Answer:
– 13.6 eV
Explanation:
energy of a H-like atom in its nth state is given by
E = – Z² x 13.6 / n² eV
For, first excited state of He⁺, n= 2, Z= 2
Eₕₑ⁺ = – 4/2² x 13.6 = – 13.6 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
- A body is moving with velocity 30 m/s towards east. After 10 seconds its velocity
- When 4 A current flows for 2 min in an electroplating experiment,
- In potentiometer experiment, a cell of emf 1.25V gives balancing length of 30 cm
- A light whose frequency is equal to 6.0 x 10¹⁴ Hz is incident on a metal
- Equal charge q each are placed at the vertices AQ and B of an equilateral triangle
Topics: Atoms and Nuclei (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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