What is the name of the third series in the spectrum of hydrogen?

Answer 1

In ascending order of the lower energy state involved in the transition,

the first six families of lines in the hydrogen spectrum are:

Lyman series

Balmer series

Paschen series

Brackett series

Pfund series

Humphreys series

Answer 2

The third series in the spectrum of hydrogen is the Paschen series, which involves transitions to the n=3 energy level. These transitions result in infrared spectral lines.