Final answer:
The value of n for the 434 nm line in the Balmer series is 5.
Step-by-step explanation:
The student asked which value of n corresponds to the 434 nm line in the Balmer series of the hydrogen spectrum. This series corresponds to electron transitions from higher-energy orbits to the second orbit (n = 2).
The 434 nm line specifically represents the transition from the n = 5 orbit to the n = 2 orbit. Thus, the value of n for the 434 nm line in the Balmer series is 5.