Which spectral series of atomic hydrogen transitions terminates at the ground state n1 = 1 and falls in the ultraviolet region?
Answer and explanation
Correct answer: D. Lyman series
- Step 1: Transitions from higher energy states (n2 = 2, 3, 4, ...) down to the ground state n1 = 1 release high energy photons. Step 2. This corresponds to the Lyman series in the ultraviolet region. Answer: Lyman series. Why not the others: Balmer series terminates at n1 = 2 (visible); Paschen series terminates at n1 = 3 (infrared); Pfund series terminates at n1 = 5 (far-infrared).
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