Question

In the Balmer series of the hydrogen spectrum, the third line corresponds to which one of the following inter-orbit jumps of the electron:

• A. $5\to 2$
• B. $4\to 1$
• C. $2\to 5$
• D. $3\to 1$

Answer 1

The correct option is A $5\to 2$

The spectral lines of the Balmer series will be observed when a transition of electron takes place from a higher energy state to the $2^{nd}$ Bohr orbit. So, the first line $3\to 2$, the second line $4\to 2$ and the third line $5\to 2$.