MCQ practice · SSC Chemistry Board questions · Chapter 3: Structure of Matter
By Bohr's model, whose atomic spectrum can be explained?
Think it through first, then pick an option.
- a H
- b He
- c Be
- d Li
Answer and explanation
Correct answer: a H
Bohr's model can explain the spectrum of hydrogen, which has one electron.
Why the other options are wrong
- b He: Helium has 2 electrons; Bohr's model cannot handle many-electron atoms.
- c Be: Beryllium has 4 electrons; Bohr's model cannot explain many-electron spectra.
- d Li: Lithium has 3 electrons; Bohr's model cannot explain its spectrum.
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