alleryWhen an electron in a hydrogen atom transitions from n = 3 to n = 2, the emitted photon belongs to the:
ALyman series
BBalmer series
CPaschen series
DBrackett series
Answer & Solution
Correct answer: B. Balmer series
1. The Balmer series corresponds to transitions ending at n = 2.
2. n = 3 → 2 is the first Balmer line (Hα, red, 656 nm).
3. Lyman series → n = 1 (UV); Paschen → n = 3; Brackett → n = 4.
_Source: syllabus Chem Ch 2 §2.3 Atomic Spectra — Hydrogen_
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