JEE Main 2025 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 7 April 2025, Shift 1, Physics Q44

Question 44 of 75 in this shift, Physics question 19 of 25, Section A.

In a hydrogen like ion, the energy difference between the

2^{\mathrm{nd}}

excitation energy state and ground is 108.8 eV. The atomic number of the ion is:

(1) $1$
(2) $3$ Official answer
(3) $2$
(4) $4$

Official answer

Option 2

NTA final key.

Chapter: Atoms
Topic: Bohr's Atomic Model
Idea tested: Scaling for Hydrogenic Ions

Same topic in other shifts

All Bohr's Atomic Model questions

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Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.