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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
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Subject: Physics
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The molecular weight of a gas is 44. The volume occupied by 2.2 g of this gas
- If alternating source of primary coil on transformer is replaced by a Laclanche cell
- A wire of length 2 m is made from 10 cm³ of copper. A force F is applied so that
- The escape velocity of a body from earth’s surface is Ve. The escape velocity
- A conveyor belt is moving at a constant speed of 2 m/s. A box is gently dropped on it
Topics: Atoms and Nuclei (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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