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ChemistryJEE Main 23 Jan 2026, Shift 1·Q1·MCQ·Easy–moderate

Structure of Atom · Bohr model energy levels

Which of the following statements regarding the energy of the stationary state is true in the following one-electron system ?
  1. (1)−1.09×10−18-1.09\times10^{-18} J for second orbit of H atom.
  2. (2)+2.18×10−18+2.18\times10^{-18} J for second orbit of HeX+\ce{He+} ion
  3. (3)+8.72×10−18+8.72\times10^{-18} J for first orbit of HeX+\ce{He+} ion
  4. (4)−2.18×10−18-2.18\times10^{-18} J for third orbit of LiX2+\ce{Li^{2+}} ion

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See the full 23 Jan 2026, Shift 1 paper